diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 37b84e98..87129420 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -88,7 +88,7 @@ jobs:
       - uses: Swatinem/rust-cache@v2
 
       - name: cargo fmt
-        run: cargo fmt --all
+        run: cargo fmt --all --check
 
       - name: cargo clippy
         run: cargo clippy -- -D warnings