diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a3b97588..eec15d93 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,35 +11,29 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-20.04 ]
-        smalltalk: [ 3.6.0, 3.6.1, 3.6.5, 3.6.6, 3.7.0 ]
+        os: [ ubuntu-20.04, ubuntu-22.04 ]
+        smalltalk: [ 3.6.6, 3.6.8, 3.7.0, 3.7.1 ]
         include:
-          - smalltalk: 3.7.0
-            os: ubuntu-22.04
+          #- smalltalk: 3.7.1
+          #  os: macos-13
           #- smalltalk: 3.7.0
           #  os: macos-13
           #- smalltalk: 3.7.0
           #  os: macos-12
-          - smalltalk: 3.7.0
-            os: macos-11
-          - smalltalk: 3.6.6
-            os: ubuntu-22.04
+          - smalltalk: 3.6.8
+            os: macos-13
+          - smalltalk: 3.6.8
+            os: macos-12
           - smalltalk: 3.6.6
             os: macos-13
           - smalltalk: 3.6.6
             os: macos-12
-          - smalltalk: 3.6.6
-            os: macos-11
-          - smalltalk: 3.6.5
-            os: macos-11
-          - smalltalk: 3.6.1
-            os: macos-11
     runs-on: ${{ matrix.os }}
     env:
       GS_VERS: ${{ matrix.smalltalk }}
       PLATFORM: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: install superDoit 
         run: |
           # required files and directories for GemStone