diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cc37168..ca8d11e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,6 +21,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+      with:
+        fetch-depth: 2 # needed by codecov sometimes
 
     - uses: actions/setup-java@v1
       with: