diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 75e3f94f4..5d5250121 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -61,6 +61,7 @@ jobs:
         scala:
           - 2.11.12
           - 2.12.13
+          - 2.13.4
   microsite:
     runs-on: ubuntu-latest
     steps: