diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2682392..18244f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,6 +12,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
     - name: composer install
       run: |
         composer install