diff --git a/rustfmt.toml b/rustfmt.toml
index dd07b125b..384bc5c30 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1,3 +1,4 @@
+edition = "2021"
 imports_granularity = "Crate"
 max_width = 80
 format_strings = true