diff --git a/.github/workflows/smalltalk-ci.yml b/.github/workflows/smalltalk-ci.yml
index 7a02830..793de09 100644
--- a/.github/workflows/smalltalk-ci.yml
+++ b/.github/workflows/smalltalk-ci.yml
@@ -8,8 +8,6 @@ jobs:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
         smalltalk:
           - Squeak64-5.3
-          - Squeak64-5.2
-          - Squeak64-5.1
           - Squeak64-trunk
     runs-on: ${{ matrix.os }}
     name: ${{ matrix.smalltalk }} on ${{ matrix.os }}