diff --git a/.github/workflows/CodeQL.yml b/.github/workflows/CodeQL.yml
index de70887..72600e4 100644
--- a/.github/workflows/CodeQL.yml
+++ b/.github/workflows/CodeQL.yml
@@ -12,6 +12,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+    - uses: actions/checkout@v2
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v1
       with: