diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 592989ee..28a30d23 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -82,6 +82,9 @@ jobs:
         with:
           node-version: "lts/*"
 
+      - name: Fetch base branch
+        run: git fetch origin "${{ github.base_ref }}"
+
       - name: Install npm dependencies
         run: npm ci