diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ca28e2f1b..28cf7b7b1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -73,6 +73,7 @@ jobs:
       uses: actions/checkout@v4
       with:
         repository: swig/swig
+        ref: v4.2.1
         path: .deps/swig
 
     - name: Install dependencies via apt