diff --git a/.github/workflows/haskell.yml b/.github/workflows/haskell.yml
index a439c61..9ee3a5d 100644
--- a/.github/workflows/haskell.yml
+++ b/.github/workflows/haskell.yml
@@ -2,9 +2,9 @@ name: Haskell CI
 
 on:
   push:
-    branches: [ 'master', 'ci' ]
+    branches: [ 'main', 'ci' ]
   pull_request:
-    branches: [ 'master' ]
+    branches: [ 'main' ]
 
 jobs:
   build: