diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 53baa6c..f7549c5 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -17,11 +17,7 @@ jobs:
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
         ocaml:
-          - ocaml-base-compiler.5.1.0
-        include:
-          - {os: ubuntu-latest, ocaml: 5.1.0}
-          - {os: ubuntu-latest, ocaml: 5.1.1}
-          - {os: ubuntu-latest, ocaml: 5.2.0}
+          - ocaml-base-compiler.5.2.0
 
     runs-on: ${{ matrix.os }}