diff --git a/.rustfmt.toml b/.rustfmt.toml
index ed1837cc..bf6262e1 100644
--- a/.rustfmt.toml
+++ b/.rustfmt.toml
@@ -1,3 +1,4 @@
+edition = "2021"
 comment_width = 100
 format_code_in_doc_comments = true
 imports_granularity = "Crate"