diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5279c04..eef57a1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,14 +20,14 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        smalltalk: [ Pharo64-12, Pharo64-11, Pharo64-10, Pharo64-9.0 ]
-    name: ${{ matrix.smalltalk }}
+        pharoversion: [ Pharo64-alpha, Pharo64-13, Pharo64-12, Pharo64-11, Pharo64-10, Pharo64-9.0 ]
+    name: ${{ matrix.pharoversion }}
     steps:
       - uses: actions/checkout@v2
       - uses: hpi-swa/setup-smalltalkCI@v1
         id: smalltalkci
         with:
-          smalltalk-image: ${{ matrix.smalltalk }}
-      - run: smalltalkci -s ${{ matrix.smalltalk }}
+          smalltalk-version: ${{ matrix.pharoversion }}
+      - run: smalltalkci -s ${{  steps.smalltalkci.outputs.smalltalk-version}}
         shell: bash
         timeout-minutes: 15