diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 1ac1752..f974291 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -12,7 +12,7 @@ repos:
   hooks:
   - id: format
     name: Format 
-    entry: cargo fmt
+    entry: cargo fmt --check
     types: [rust]
     language: system
     pass_filenames: false