diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 985d2f2d..f5fcd22d 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -90,7 +90,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Install dependencies
-        run: yarn
+        run: yarn install --frozen-lockfile
       - name: Run checks
         run: |
           yarn lint