diff --git a/.github/workflows/haskell.yml b/.github/workflows/haskell.yml
index 6e6e557..7a4b6d8 100644
--- a/.github/workflows/haskell.yml
+++ b/.github/workflows/haskell.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: actions/setup-haskell@v1
       with:
         ghc-version: '8.10'