diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 643e8963..85b5e4ba 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        smalltalk: [ Pharo64-9.0, Pharo64-10, Pharo64-11 ]
+        smalltalk: [ Pharo64-9.0, Pharo64-10, Pharo64-11, Pharo64-12 ]
     name: ${{ matrix.smalltalk }}
     steps:
       - uses: actions/checkout@v2