1 files changed, 1 insertions, 1 deletions
diff --git a/Cargo.toml b/Cargo.toml
index 1c3d0c8..27d0587 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "pandoc-filter-diagram"
 version = "0.1.0"
-edition = "2021"
+edition = "2018"
 authors = [
   "Lars Wirzenius <liw@liw.fi>",
   "Daniel Silverstone <dsilvers@digital-scurf.org>",