diff --git a/AGENTS.md b/AGENTS.md
index d6ff605..2dbcbe3 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -1,2 +1,2 @@
 - always check with `cargo clippy` and fix the issues
-- always do a final `cargo fmt` after you're done with all changes
+- always do a final `cargo +nightly fmt` after you're done with all changes