diff --git a/.github/workflows/nixfmt.yml b/.github/workflows/nixfmt.yml
index 873a950..79db4d6 100644
--- a/.github/workflows/nixfmt.yml
+++ b/.github/workflows/nixfmt.yml
@@ -3,7 +3,7 @@ name: Nix Format Check
 on:
   pull_request:
   push:
-    branches: [ main ]
+    branches: [ main master ]
 
 jobs:
   check-format: