Merge branch 'chores' into 'main'

Various chores and updates pre-release

Closes #313

See merge request subplot/subplot!320

10 files changed, 303 insertions, 206 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 577d838..50d52b8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -33,9 +33,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.69"
+version = "1.0.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "224afbd727c3d6e4b90103ece64b8d1b67fbb1973b1046c2281eed3f3803f800"
+checksum = "7de8ce5e0f9f8d88245311066a578d72b7af3e7088f32783804676302df237e4"
 
 [[package]]
 name = "as-slice"
@@ -65,9 +65,9 @@ checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
 [[package]]
 name = "base64"
-version = "0.13.1"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
+checksum = "a4a4ddaa51a5bc52a6948f74c06d20aaaddb71924eab79b8c97a8c556e942d6a"
 
 [[package]]
 name = "bitflags"
@@ -77,18 +77,18 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "block-buffer"
-version = "0.10.3"
+version = "0.10.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "69cce20737498f97b993470a6e536b8523f0af7892a4f928cceb1ac5e52ebe7e"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
 dependencies = [
  "generic-array",
 ]
 
 [[package]]
 name = "bstr"
-version = "1.3.0"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ffdb39cb703212f3c11973452c2861b972f757b021158f3516ba10f2fa8b2c1"
+checksum = "c3d4260bcc2e8fc9df1eac4919a720effeb63a3f0952f5bf4944adfa18897f09"
 dependencies = [
  "memchr",
  "serde",
@@ -102,12 +102,6 @@ checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
 
 [[package]]
 name = "cfg-if"
-version = "0.1.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
-
-[[package]]
-name = "cfg-if"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
@@ -154,7 +148,7 @@ dependencies = [
  "proc-macro-error",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -167,7 +161,7 @@ dependencies = [
  "proc-macro-error",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -190,23 +184,14 @@ dependencies = [
 
 [[package]]
 name = "cpufeatures"
-version = "0.2.5"
+version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28d997bd5e24a5928dd43e46dc529867e207907fe0b239c3477d924f7f2ca320"
+checksum = "280a9f2d8b3a38871a3c8a46fb80db65e5e5ed97da80c4d08bf27fb63e35e181"
 dependencies = [
  "libc",
 ]
 
 [[package]]
-name = "crossbeam-utils"
-version = "0.8.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c063cd8cc95f5c377ed0d4b49a4b21f632396ff690e8470c29b3359b346984b"
-dependencies = [
- "cfg-if 1.0.0",
-]
-
-[[package]]
 name = "crypto-common"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -218,11 +203,11 @@ dependencies = [
 
 [[package]]
 name = "cvt"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34ac344c7efccb80cd25bc61b2170aec26f2f693fd40e765a539a1243db48c71"
+checksum = "d2ae9bf77fbf2d39ef573205d554d87e86c12f1994e9ea335b0651b9b278bcf1"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if",
 ]
 
 [[package]]
@@ -243,12 +228,12 @@ dependencies = [
 
 [[package]]
 name = "env_logger"
-version = "0.9.3"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a12e6657c4c97ebab115a42dcee77225f7f482cdd841cf7088c657a42e9e00e7"
+checksum = "85cdab6a89accf66733ad5a1693a4dcced6aeff64602b634530dd73c1f3ee9f0"
 dependencies = [
- "atty",
  "humantime",
+ "is-terminal",
  "log",
  "regex",
  "termcolor",
@@ -256,13 +241,13 @@ dependencies = [
 
 [[package]]
 name = "errno"
-version = "0.2.8"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f639046355ee4f37944e44f60642c6f3a7efa3cf6b78c78a0d989a8ce6c396a1"
+checksum = "4bcfec3a70f97c962c307b2d2c56e358cf1d00b558d74262b5f929ee8cc7e73a"
 dependencies = [
  "errno-dragonfly",
  "libc",
- "winapi",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -301,7 +286,7 @@ checksum = "ccb5acb1045ebbfa222e2c50679e392a71dd77030b78fb0189f2d9c5974400f9"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -312,14 +297,14 @@ checksum = "31a7a908b8f32538a2143e59a6e4e2508988832d5d4d6f7c156b3cbc762643a5"
 
 [[package]]
 name = "filetime"
-version = "0.2.20"
+version = "0.2.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a3de6e8d11b22ff9edc6d916f890800597d60f8b2da1caf2955c274638d6412"
+checksum = "5cbc844cecaee9d4443931972e1289c8ff485cb4cc2767cb03ca139ed6885153"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "libc",
- "redox_syscall",
- "windows-sys 0.45.0",
+ "redox_syscall 0.2.16",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -340,12 +325,12 @@ dependencies = [
 
 [[package]]
 name = "fs_at"
-version = "0.1.1"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab60b097d8208fe02d24ae954c3248a9436f96edefa8f4b9fcb0f26d60d003a9"
+checksum = "37047c0d530b3aefc64e4c4d7c6b1e23030c65973661b70e12c826f426f3f675"
 dependencies = [
  "aligned",
- "cfg-if 1.0.0",
+ "cfg-if",
  "cvt",
  "libc",
  "nix",
@@ -368,9 +353,9 @@ dependencies = [
 
 [[package]]
 name = "generic-array"
-version = "0.14.6"
+version = "0.14.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bff49e947297f3312447abdca79f45f4738097cc82b06e72054d2223f601f1b9"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
 dependencies = [
  "typenum",
  "version_check",
@@ -387,11 +372,11 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.8"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c05aeb6a22b8f62540c194aac980f2115af067bfe15a0734d7277a768d396b31"
+checksum = "c85e1d9ab2eadba7e5040d4e09cbd6d072b76a557ad64e797c2cb9d4da21d7e4"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "libc",
  "wasi",
 ]
@@ -415,7 +400,7 @@ dependencies = [
  "log",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
  "time",
 ]
 
@@ -490,9 +475,12 @@ dependencies = [
 
 [[package]]
 name = "humansize"
-version = "1.1.1"
+version = "2.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02296996cb8796d7c6e3bc2d9211b7802812d36999a51bb754123ead7d37d026"
+checksum = "6cb51c9a029ddc91b07a787f1d86b53ccfa49b0e86688c946ebe8d3555685dd7"
+dependencies = [
+ "libm",
+]
 
 [[package]]
 name = "humantime"
@@ -502,11 +490,10 @@ checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
 
 [[package]]
 name = "ignore"
-version = "0.4.18"
+version = "0.4.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "713f1b139373f96a2e0ce3ac931cd01ee973c3c5dd7c40c0c2efe96ad2b6751d"
+checksum = "dbe7873dab538a9a44ad79ede1faf5f30d49f9a5c883ddbab48bce81b64b7492"
 dependencies = [
- "crossbeam-utils",
  "globset",
  "lazy_static",
  "log",
@@ -520,9 +507,9 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "1.9.2"
+version = "1.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1885e79c1fc4b10f0e172c475f458b7f7b93061064d98c3293e98c5ba0c8b399"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
 dependencies = [
  "autocfg",
  "hashbrown",
@@ -534,29 +521,30 @@ version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
 ]
 
 [[package]]
 name = "io-lifetimes"
-version = "1.0.6"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cfa919a82ea574332e2de6e74b4c36e74d41982b335080fa59d4ef31be20fdf3"
+checksum = "9c66c74d2ae7e79a5a8f7ac924adbe38ee42a859c6539ad869eb51f0b52dc220"
 dependencies = [
+ "hermit-abi 0.3.1",
  "libc",
- "windows-sys 0.45.0",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
 name = "is-terminal"
-version = "0.4.4"
+version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "21b6b32576413a8e69b90e952e4a026476040d81017b80445deda5f2d3921857"
+checksum = "adcf93614601c8129ddf72e2d5633df827ba6551541c6d8c59520a371475be1f"
 dependencies = [
  "hermit-abi 0.3.1",
  "io-lifetimes",
  "rustix",
- "windows-sys 0.45.0",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -573,9 +561,15 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.139"
+version = "0.2.141"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3304a64d199bb964be99741b7a14d26972741915b3649639149b2479bb46f4b5"
+
+[[package]]
+name = "libm"
+version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "201de327520df007757c1f0adce6e827fe8562fbc28bfd9c15571c66ca1f5f79"
+checksum = "348108ab3fba42ec82ff6e9564fc4ca0247bdccdc68dd8af9764bbc79c3c8ffb"
 
 [[package]]
 name = "line-col"
@@ -591,9 +585,9 @@ checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.1.4"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f051f77a7c8e6957c0696eac88f26b0117e54f52d3fc682ab19397a8812846a4"
+checksum = "d59d8c75012853d2e872fb56bc8a2e53718e2cafe1a4c823143141c6d90c322f"
 
 [[package]]
 name = "log"
@@ -601,7 +595,7 @@ version = "0.4.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
 ]
 
 [[package]]
@@ -610,7 +604,7 @@ version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ff50ecb28bb86013e935fb6683ab1f6d3a20016f123c76fd4c27470076ac30f5"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "generator",
  "scoped-tls",
  "serde",
@@ -641,7 +635,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bfdda3d196821d6af13126e40375cdf7da646a96114af134d5f417a9a1dc8e1a"
 dependencies = [
  "bitflags",
- "cfg-if 1.0.0",
+ "cfg-if",
  "libc",
  "static_assertions",
 ]
@@ -654,11 +648,11 @@ checksum = "b93853da6d84c2e3c7d730d6473e8817692dd89be387eb01b94d7f108ecb5b8c"
 
 [[package]]
 name = "normpath"
-version = "1.1.0"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "972dec05f98e7c787ede35d7a9ea4735eb7788c299287352757b3def6cc1f7b5"
+checksum = "ec60c60a693226186f5d6edf073232bfb6464ed97eb22cf3b01c1e8198fd97f5"
 dependencies = [
- "windows-sys 0.45.0",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -672,15 +666,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "num_threads"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2819ce041d2ee131036f4fc9d6ae7ae125a3a40e97ba64d04fe799ad9dabbb44"
-dependencies = [
- "libc",
-]
-
-[[package]]
 name = "once_cell"
 version = "1.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -688,9 +673,9 @@ checksum = "b7e5500299e16ebb147ae15a00a942af264cf3688f47923b8fc2cd5858f23ad3"
 
 [[package]]
 name = "os_str_bytes"
-version = "6.1.0"
+version = "6.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "21326818e99cfe6ce1e524c2a805c189a99b5ae555a35d19f9a284b427d86afa"
+checksum = "ceedf44fb00f2d1984b0bc98102627ce622e083e49a5bacdb3e514fa4238e267"
 
 [[package]]
 name = "overload"
@@ -706,9 +691,9 @@ checksum = "478c572c3d73181ff3c2539045f6eb99e5491218eae919370993b890cdbdd98e"
 
 [[package]]
 name = "pest"
-version = "2.5.6"
+version = "2.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8cbd939b234e95d72bc393d51788aec68aeeb5d51e748ca08ff3aad58cb722f7"
+checksum = "7b1403e8401ad5dedea73c626b99758535b342502f8d1e361f4a2dd952749122"
 dependencies = [
  "thiserror",
  "ucd-trie",
@@ -716,9 +701,9 @@ dependencies = [
 
 [[package]]
 name = "pest_derive"
-version = "2.5.6"
+version = "2.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a81186863f3d0a27340815be8f2078dd8050b14cd71913db9fbda795e5f707d7"
+checksum = "be99c4c1d2fc2769b1d00239431d711d08f6efedcecb8b6e30707160aee99c15"
 dependencies = [
  "pest",
  "pest_generator",
@@ -726,22 +711,22 @@ dependencies = [
 
 [[package]]
 name = "pest_generator"
-version = "2.5.6"
+version = "2.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75a1ef20bf3193c15ac345acb32e26b3dc3223aff4d77ae4fc5359567683796b"
+checksum = "e56094789873daa36164de2e822b3888c6ae4b4f9da555a1103587658c805b1e"
 dependencies = [
  "pest",
  "pest_meta",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.13",
 ]
 
 [[package]]
 name = "pest_meta"
-version = "2.5.6"
+version = "2.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e3b284b1f13a20dc5ebc90aff59a51b8d7137c221131b52a7260c08cbc1cc80"
+checksum = "6733073c7cff3d8459fda0e42f13a047870242aed8b509fe98000928975f359e"
 dependencies = [
  "once_cell",
  "pest",
@@ -779,7 +764,7 @@ dependencies = [
  "proc-macro-error-attr",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
  "version_check",
 ]
 
@@ -796,9 +781,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.51"
+version = "1.0.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d727cae5b39d21da60fa540906919ad737832fe0b1c165da3a34d6548c849d6"
+checksum = "2b63bdb0cd06f1f4dedf69b254734f9b45af66e4a031e42a7480257d9898b435"
 dependencies = [
  "unicode-ident",
 ]
@@ -817,9 +802,9 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "1.0.23"
+version = "1.0.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8856d8364d252a14d474036ea1358d63c9e6965c8e5c1885c18f73d70bff9c7b"
+checksum = "4424af4bf778aae2051a77b60283332f386554255d722233d09fbfc7e30da2fc"
 dependencies = [
  "proc-macro2",
 ]
@@ -864,10 +849,19 @@ dependencies = [
 ]
 
 [[package]]
+name = "redox_syscall"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "567664f262709473930a4bf9e51bf2ebf3348f2e748ccc50dea20646858f8f29"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
 name = "regex"
-version = "1.7.1"
+version = "1.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48aaa5748ba571fb95cd2c85c09f629215d3a6ece942baa100950af03a34f733"
+checksum = "8b1f693b24f6ac912f4893ef08244d70b6067480d2f1a46e950c9691e6749d1d"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -885,18 +879,18 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.28"
+version = "0.6.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "456c603be3e8d448b072f410900c09faf164fbce2d480456f50eea6e25f9c848"
+checksum = "f162c6dd7b008981e4d40210aca20b4bd0f9b60ca9271061b07f78537722f2e1"
 
 [[package]]
 name = "remove_dir_all"
-version = "0.8.1"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7174320e07c29945955cedd70b865995b286847111c8308d349a1f3a9e3af555"
+checksum = "23895cfadc1917fed9c6ed76a8c2903615fa3704f7493ff82b364c6540acc02b"
 dependencies = [
  "aligned",
- "cfg-if 1.0.0",
+ "cfg-if",
  "cvt",
  "fs_at",
  "lazy_static",
@@ -914,23 +908,23 @@ dependencies = [
  "anyhow",
  "clap 3.2.23",
  "serde",
- "serde_yaml",
+ "serde_yaml 0.8.26",
  "textwrap 0.15.2",
  "thiserror",
 ]
 
 [[package]]
 name = "rustix"
-version = "0.36.9"
+version = "0.37.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd5c6ff11fecd55b40746d1995a02f2eb375bf8c00d192d521ee09f42bef37bc"
+checksum = "85597d61f83914ddeba6a47b3b8ffe7365107221c2e557ed94426489fefb5f77"
 dependencies = [
  "bitflags",
  "errno",
  "io-lifetimes",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.45.0",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -962,18 +956,18 @@ checksum = "e1cf6437eb19a8f4a6cc0f7dca544973b0b78843adbfeb3683d1a94a0024a294"
 
 [[package]]
 name = "serde"
-version = "1.0.153"
+version = "1.0.159"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3a382c72b4ba118526e187430bb4963cd6d55051ebf13d9b25574d379cc98d20"
+checksum = "3c04e8343c3daeec41f58990b9d77068df31209f2af111e059e9fe9646693065"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde-aux"
-version = "4.1.2"
+version = "4.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c599b3fd89a75e0c18d6d2be693ddb12cccaf771db4ff9e39097104808a014c0"
+checksum = "c3dfe1b7eb6f9dcf011bd6fad169cdeaae75eda0d61b1a99a3f015b41b0cae39"
 dependencies = [
  "serde",
  "serde_json",
@@ -981,20 +975,20 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.153"
+version = "1.0.159"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ef476a5790f0f6decbc66726b6e5d63680ed518283e64c7df415989d880954f"
+checksum = "4c614d17805b093df4b147b51339e7e44bf05ef59fba1e45d83500bcfb4d8585"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.13",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.94"
+version = "1.0.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1c533a59c9d8a93a09c6ab31f0fd5e5f4dd1b8fc9434804029839884765d04ea"
+checksum = "d721eca97ac802aa7777b701877c8004d950fc142651367300d21c1cc0194744"
 dependencies = [
  "itoa",
  "ryu",
@@ -1014,12 +1008,25 @@ dependencies = [
 ]
 
 [[package]]
+name = "serde_yaml"
+version = "0.9.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9d684e3ec7de3bf5466b32bd75303ac16f0736426e5a4e0d6e489559ce1249c"
+dependencies = [
+ "indexmap",
+ "itoa",
+ "ryu",
+ "serde",
+ "unsafe-libyaml",
+]
+
+[[package]]
 name = "sha2"
 version = "0.10.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "82e6b795fe2e3b1e845bafcb27aa35405c4d47cdfc92af5fc8d3002f76cebdc0"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "cpufeatures",
  "digest",
 ]
@@ -1062,7 +1069,7 @@ checksum = "133659a15339456eeeb07572eb02a91c91e9815e9cbc89566944d2c8d3efdbf6"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -1119,7 +1126,7 @@ dependencies = [
  "serde",
  "serde-aux",
  "serde_json",
- "serde_yaml",
+ "serde_yaml 0.9.21",
  "tempfile",
  "tempfile-fast",
  "tera",
@@ -1175,7 +1182,7 @@ dependencies = [
  "fehler",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.13",
 ]
 
 [[package]]
@@ -1190,16 +1197,27 @@ dependencies = [
 ]
 
 [[package]]
+name = "syn"
+version = "2.0.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c9da457c5285ac1f936ebd076af6dac17a61cfe7826f2076b4d015cf47bc8ec"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
 name = "tempfile"
-version = "3.4.0"
+version = "3.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af18f7ae1acd354b992402e9ec5864359d693cd8a79dcbef59f76891701c1e95"
+checksum = "b9fbec84f381d5795b08656e4912bec604d162bff9291d6189a78f4c8ab87998"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "fastrand",
- "redox_syscall",
+ "redox_syscall 0.3.5",
  "rustix",
- "windows-sys 0.42.0",
+ "windows-sys 0.45.0",
 ]
 
 [[package]]
@@ -1215,9 +1233,9 @@ dependencies = [
 
 [[package]]
 name = "tera"
-version = "1.17.1"
+version = "1.18.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3df578c295f9ec044ff1c829daf31bb7581d5b3c2a7a3d87419afe1f2531438c"
+checksum = "95a665751302f22a03c56721e23094e4dc22b04a80f381e6737a07bf7a7c70c0"
 dependencies = [
  "globwalk",
  "humansize",
@@ -1230,6 +1248,7 @@ dependencies = [
  "serde",
  "serde_json",
  "slug",
+ "thread_local",
  "unic-segment",
 ]
 
@@ -1261,51 +1280,59 @@ checksum = "222a222a5bfe1bba4a77b45ec488a741b3cb8872e5e499451fd7d0129c9c7c3d"
 
 [[package]]
 name = "thiserror"
-version = "1.0.39"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5ab016db510546d856297882807df8da66a16fb8c4101cb8b30054b0d5b2d9c"
+checksum = "978c9a314bd8dc99be594bc3c175faaa9794be04a5a5e153caba6915336cebac"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.39"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5420d42e90af0c38c3290abcca25b9b3bdf379fc9f55c528f53a269d9c9a267e"
+checksum = "f9456a42c5b0d803c8cd86e73dd7cc9edd429499f37a3550d286d5e86720569f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.13",
 ]
 
 [[package]]
 name = "thread_local"
-version = "1.1.7"
+version = "1.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fdd6f064ccff2d6567adcb3873ca630700f00b5ad3f060c25b5dcfd9a4ce152"
+checksum = "5516c27b78311c50bf42c071425c560ac799b11c30b31f87e3081965fe5e0180"
 dependencies = [
- "cfg-if 1.0.0",
  "once_cell",
 ]
 
 [[package]]
 name = "time"
-version = "0.3.9"
+version = "0.3.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2702e08a7a860f005826c6815dcac101b19b5eb330c27fe4a5928fec1d20ddd"
+checksum = "cd0cbfecb4d19b5ea75bb31ad904eb5b9fa13f21079c3b92017ebdf4999a5890"
 dependencies = [
  "itoa",
- "libc",
- "num_threads",
+ "serde",
+ "time-core",
  "time-macros",
 ]
 
 [[package]]
+name = "time-core"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e153e1f1acaef8acc537e68b44906d2db6436e2b35ac2c6b42640fff91f00fd"
+
+[[package]]
 name = "time-macros"
-version = "0.2.4"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42657b1a6f4d817cda8e7a0ace261fe0cc946cf3a80314390b22cc61ae080792"
+checksum = "fd80a657e71da814b8e5d60d3374fc6d35045062245d80224748ae522dd76f36"
+dependencies = [
+ "time-core",
+]
 
 [[package]]
 name = "tracing"
@@ -1313,7 +1340,7 @@ version = "0.1.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ce8c33a8d48bd45d624a6e523445fd21ec13d3653cd51f681abf67418f54eb8"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "pin-project-lite",
  "tracing-attributes",
  "tracing-core",
@@ -1327,7 +1354,7 @@ checksum = "4017f8f45139870ca7e672686113917c71c7a6e02d4924eda67186083c03081a"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -1469,6 +1496,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c0edd1e5b14653f783770bce4a4dabb4a5108a5370a5f5d8cfe8710c361f6c8b"
 
 [[package]]
+name = "unsafe-libyaml"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1865806a559042e51ab5414598446a5871b561d21b6764f2eabb0dd481d880a6"
+
+[[package]]
 name = "utf8-width"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1488,12 +1521,11 @@ checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
 [[package]]
 name = "walkdir"
-version = "2.3.2"
+version = "2.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "808cf2735cd4b6866113f648b791c6adc5714537bc222d9347bb203386ffda56"
+checksum = "36df944cda56c7d8d8b7496af378e6b16de9284591917d307c9b4d313c44e698"
 dependencies = [
  "same-file",
- "winapi",
  "winapi-util",
 ]
 
@@ -1540,89 +1572,140 @@ version = "0.44.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9e745dab35a0c4c77aa3ce42d595e13d2003d6902d6b08c9ef5fc326d08da12b"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.42.2",
 ]
 
 [[package]]
 name = "windows-sys"
-version = "0.42.0"
+version = "0.45.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a3e1820f08b8513f676f7ab6c1f99ff312fb97b553d30ff4dd86f9f15728aa7"
+checksum = "75283be5efb2831d37ea142365f009c02ec203cd29a3ebecbc093d52315b66d0"
 dependencies = [
- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
+ "windows-targets 0.42.2",
 ]
 
 [[package]]
 name = "windows-sys"
-version = "0.45.0"
+version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75283be5efb2831d37ea142365f009c02ec203cd29a3ebecbc093d52315b66d0"
+checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+dependencies = [
+ "windows-targets 0.48.0",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e5180c00cd44c9b1c88adb3693291f1cd93605ded80c250a75d472756b4d071"
 dependencies = [
- "windows-targets",
+ "windows_aarch64_gnullvm 0.42.2",
+ "windows_aarch64_msvc 0.42.2",
+ "windows_i686_gnu 0.42.2",
+ "windows_i686_msvc 0.42.2",
+ "windows_x86_64_gnu 0.42.2",
+ "windows_x86_64_gnullvm 0.42.2",
+ "windows_x86_64_msvc 0.42.2",
 ]
 
 [[package]]
 name = "windows-targets"
-version = "0.42.1"
+version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e2522491fbfcd58cc84d47aeb2958948c4b8982e9a2d8a2a35bbaed431390e7"
+checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
 dependencies = [
- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
+ "windows_aarch64_gnullvm 0.48.0",
+ "windows_aarch64_msvc 0.48.0",
+ "windows_i686_gnu 0.48.0",
+ "windows_i686_msvc 0.48.0",
+ "windows_x86_64_gnu 0.48.0",
+ "windows_x86_64_gnullvm 0.48.0",
+ "windows_x86_64_msvc 0.48.0",
 ]
 
 [[package]]
 name = "windows_aarch64_gnullvm"
-version = "0.42.1"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "597a5118570b68bc08d8d59125332c54f1ba9d9adeedeef5b99b02ba2b0698f8"
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c9864e83243fdec7fc9c5444389dcbbfd258f745e7853198f365e3c4968a608"
+checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
 
 [[package]]
 name = "windows_aarch64_msvc"
-version = "0.42.1"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e08e8864a60f06ef0d0ff4ba04124db8b0fb3be5776a5cd47641e942e58c4d43"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c8b1b673ffc16c47a9ff48570a9d85e25d265735c503681332589af6253c6c7"
+checksum = "c61d927d8da41da96a81f029489353e68739737d3beca43145c8afec9a31a84f"
 
 [[package]]
 name = "windows_i686_gnu"
-version = "0.42.1"
+version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de3887528ad530ba7bdbb1faa8275ec7a1155a45ffa57c37993960277145d640"
+checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
 
 [[package]]
 name = "windows_i686_msvc"
-version = "0.42.1"
+version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf4d1122317eddd6ff351aa852118a2418ad4214e6613a50e0191f7004372605"
+checksum = "44d840b6ec649f480a41c8d80f9c65108b92d89345dd94027bfe06ac444d1060"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8de912b8b8feb55c064867cf047dda097f92d51efad5b491dfb98f6bbb70cb36"
 
 [[package]]
 name = "windows_x86_64_gnu"
-version = "0.42.1"
+version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1040f221285e17ebccbc2591ffdc2d44ee1f9186324dd3e84e99ac68d699c45"
+checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
 
 [[package]]
 name = "windows_x86_64_gnullvm"
-version = "0.42.1"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26d41b46a36d453748aedef1486d5c7a85db22e56aff34643984ea85514e94a3"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "628bfdf232daa22b0d64fdb62b09fcc36bb01f05a3939e20ab73aaf9470d0463"
+checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
 
 [[package]]
 name = "windows_x86_64_msvc"
-version = "0.42.1"
+version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "447660ad36a13288b1db4d4248e857b510e8c3a225c822ba4fb748c0aafecffd"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
 
 [[package]]
 name = "yaml-rust"
diff --git a/Cargo.toml b/Cargo.toml
index 256fa47..6d5477a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ authors = [
   "Lars Wirzenius <liw@liw.fi>",
   "Daniel Silverstone <dsilvers@digital-scurf.org>",
 ]
-edition = "2018"
+edition = "2021"
 license = "MIT-0"
 description = '''
 tools for specifying, documenting,
@@ -13,13 +13,14 @@ and implementing automated acceptance tests for systems and software'''
 homepage = "https://subplot.tech/"
 repository = "https://gitlab.com/subplot/subplot"
 default-run = "subplot"
+rust-version = "1.63"
 
 [workspace]
 members = ["subplotlib", "subplotlib-derive", "subplot-build", "examples/seq"]
 
 [dependencies]
 anyhow = "1"
-base64 = "0.13.0"
+base64 = "0.21.0"
 clap = { version = "4", features = ["derive", "env", "string"] }
 file_diff = "1"
 git-testament = "0.2"
@@ -32,17 +33,17 @@ roadmap = "0.4.5"
 serde = { version = "1.0.101", features = ["derive"] }
 serde-aux = { version = "4.0", default-features = false }
 serde_json = "1.0"
-serde_yaml = "0.8.26"
+serde_yaml = "0.9.21"
 tempfile = "3.1.0"
 tempfile-fast = "0.3.1"
 thiserror = "1"
 time = { version = "0.3", features = ["formatting", "macros"] }
-env_logger = "0.9.0"
+env_logger = "0.10.0"
 html-escape = "0.2.13"
 line-col = "0.2.1"
 
 [dependencies.tera]
-version = "1"
+version = "1.18"
 default-features = false
 # Expand out tera's default featurs, except for chrono related ones
 features = ["slug", "percent-encoding", "humansize", "rand"]
diff --git a/src/codegen.rs b/src/codegen.rs
index 8c69ed3..9f346a9 100644
--- a/src/codegen.rs
+++ b/src/codegen.rs
@@ -4,7 +4,7 @@ use std::fs::File;
 use std::io::Write;
 use std::path::{Path, PathBuf};
 
-use base64::encode;
+use base64::prelude::{Engine as _, BASE64_STANDARD};
 
 use serde::Serialize;
 use tera::{Context, Tera, Value};
@@ -88,7 +88,7 @@ fn write(filename: &Path, content: &str) -> Result<(), SubplotError> {
 
 fn base64(v: &Value, _: &HashMap<String, Value>) -> tera::Result<Value> {
     match v {
-        Value::String(s) => Ok(Value::String(encode(s))),
+        Value::String(s) => Ok(Value::String(BASE64_STANDARD.encode(s))),
         _ => Err(tera::Error::msg(
             "can only base64 encode strings".to_string(),
         )),
diff --git a/src/md.rs b/src/md.rs
index 90b5aba..9ad30bc 100644
--- a/src/md.rs
+++ b/src/md.rs
@@ -360,6 +360,8 @@ mod typeset {
     use crate::{DiagramMarkup, DotMarkup, PikchrMarkup, PlantumlMarkup, Svg};
     // use crate::{Warning, Warnings};
 
+    use base64::prelude::{Engine as _, BASE64_STANDARD};
+
     pub(crate) fn typeset_element(e: &Element) -> Result<Element, SubplotError> {
         match e.tag() {
             ElementTag::Pre if e.has_attr("class", "scenario") => typeset_scenario(e),
@@ -434,7 +436,7 @@ mod typeset {
     }
 
     fn svg_as_data_url(svg: Svg) -> String {
-        let svg = base64::encode(svg.data());
+        let svg = BASE64_STANDARD.encode(svg.data());
         format!("data:image/svg+xml;base64,{svg}")
     }
 
diff --git a/subplot-build/Cargo.toml b/subplot-build/Cargo.toml
index a732db3..3aa5c10 100644
--- a/subplot-build/Cargo.toml
+++ b/subplot-build/Cargo.toml
@@ -5,12 +5,13 @@ authors = [
   "Lars Wirzenius <liw@liw.fi>",
   "Daniel Silverstone <dsilvers@digital-scurf.org>",
 ]
-edition = "2018"
+edition = "2021"
 license = "MIT-0"
 description = '''A library for using Subplot code generation from another project's
 `build.rs` module.'''
 homepage = "https://subplot.tech/"
 repository = "https://gitlab.com/subplot/subplot"
+rust-version = "1.63"
 
 
 [dependencies]
diff --git a/subplotlib-derive/Cargo.toml b/subplotlib-derive/Cargo.toml
index 36337d4..eaa079e 100644
--- a/subplotlib-derive/Cargo.toml
+++ b/subplotlib-derive/Cargo.toml
@@ -5,19 +5,20 @@ authors = [
   "Lars Wirzenius <liw@liw.fi>",
   "Daniel Silverstone <dsilvers@digital-scurf.org>",
 ]
-edition = "2018"
+edition = "2021"
 license = "MIT-0"
 description = '''
 macros for constructing subplotlib based test suites, typically
 generated by `subplot codegen`.'''
 homepage = "https://subplot.tech/"
 repository = "https://gitlab.com/subplot/subplot"
+rust-version = "1.63"
 
 [lib]
 proc-macro = true
 
 [dependencies]
-syn = { version = "1", features = ["full"] }
+syn = { version = "2", features = ["full"] }
 quote = "1"
 proc-macro2 = "1"
 fehler = "1"
diff --git a/subplotlib-derive/src/lib.rs b/subplotlib-derive/src/lib.rs
index 584d730..83e4adf 100644
--- a/subplotlib-derive/src/lib.rs
+++ b/subplotlib-derive/src/lib.rs
@@ -209,19 +209,19 @@ fn process_step(mut input: ItemFn) -> proc_macro2::TokenStream {
     let contexts: Vec<Type> = input
         .attrs
         .iter()
-        .filter(|attr| attr.path.is_ident("context"))
+        .filter(|attr| attr.path().is_ident("context"))
         .map(|attr| {
             let ty: Type = attr.parse_args()?;
             Ok(ty)
         })
         .collect::<Result<_, Error>>()?;
 
-    input.attrs.retain(|f| !f.path.is_ident("context"));
+    input.attrs.retain(|f| !f.path().is_ident("context"));
 
     let docs: Vec<_> = input
         .attrs
         .iter()
-        .filter(|attr| attr.path.is_ident("doc"))
+        .filter(|attr| attr.path().is_ident("doc"))
         .collect();
 
     let fields = input
diff --git a/subplotlib/Cargo.toml b/subplotlib/Cargo.toml
index 2bdf86e..16830f2 100644
--- a/subplotlib/Cargo.toml
+++ b/subplotlib/Cargo.toml
@@ -5,20 +5,21 @@ authors = [
   "Lars Wirzenius <liw@liw.fi>",
   "Daniel Silverstone <dsilvers@digital-scurf.org>",
 ]
-edition = "2018"
+edition = "2021"
 license = "MIT-0"
 description = '''
 Utility functions and types for `subplot codegen` generated Rust based
 test suites.  Relies on `subplotlib-derive` for associated macros.'''
 homepage = "https://subplot.tech/"
 repository = "https://gitlab.com/subplot/subplot"
+rust-version = "1.63"
 
 
 [dependencies]
 fehler = "1"
 subplotlib-derive = { version = "0.6.0", path = "../subplotlib-derive" }
 lazy_static = "1"
-base64 = "0.13"
+base64 = "0.21.0"
 state = "0.5"
 tempfile = "3.1"
 fs2 = "0.4"
diff --git a/subplotlib/src/file.rs b/subplotlib/src/file.rs
index 84f3495..c1c9afe 100644
--- a/subplotlib/src/file.rs
+++ b/subplotlib/src/file.rs
@@ -7,7 +7,8 @@
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
-use base64::decode;
+use base64::prelude::{Engine as _, BASE64_STANDARD};
+
 /// An embedded data file.
 ///
 /// Embedded data files have names and content.  The subplot template will generate
@@ -82,11 +83,16 @@ impl SubplotDataFile {
     ///
     /// This will panic if the passed in strings are not correctly base64 encoded.
     pub fn new(name: &str, data: &str) -> Self {
-        let name = decode(name).expect("Subplot generated bad base64?");
+        let name = BASE64_STANDARD
+            .decode(name)
+            .expect("Subplot generated bad base64?");
         let name = String::from_utf8_lossy(&name);
         let name: PathBuf = name.as_ref().into();
         let name = name.into();
-        let data = decode(data).expect("Subplot generated bad base64?").into();
+        let data = BASE64_STANDARD
+            .decode(data)
+            .expect("Subplot generated bad base64?")
+            .into();
         Self { name, data }
     }
 
diff --git a/subplotlib/src/utils.rs b/subplotlib/src/utils.rs
index 642848a..25a9360 100644
--- a/subplotlib/src/utils.rs
+++ b/subplotlib/src/utils.rs
@@ -1,5 +1,7 @@
 //! Utility functions used by subplotlib or the generated test functions
 
+use base64::prelude::{Engine as _, BASE64_STANDARD};
+
 /// Decode a base64 string.
 ///
 /// If the result is not a valid utf8 string then it is lossily coerced.
@@ -14,6 +16,6 @@
 ///
 /// Will panic if it's not valid base64 leading to a string.
 pub fn base64_decode(input: &str) -> String {
-    let dec = base64::decode(input).expect("bad base64");
+    let dec = BASE64_STANDARD.decode(input).expect("bad base64");
     String::from_utf8_lossy(&dec).to_string()
 }