diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b356aa02..c5569459 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,7 @@ jobs:
             compiler: clang
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
 
       - name: Install project dependencies (Linux)
         if: ${{ runner.os == 'Linux' }}