diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 06f6d0875..f09e83d69 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -17,20 +17,20 @@ jobs:
         ocaml-compiler:
           - 4.04.x
           - 4.05.x
-          - 4.06.x
-          - 4.07.x
-          - 4.08.x
-          - 4.09.x
-          - 4.10.x
           - 4.11.x
-          - 4.12.x
           - 4.13.x
           - 4.14.x
+          - 5.0.x
+          - 5.1.x
         include:
           - os: macos-latest
             ocaml-compiler: 4.14.x
           - os: windows-latest
             ocaml-compiler: 4.14.x
+          - os: macos-latest
+            ocaml-compiler: 5.1.x
+          - os: windows-latest
+            ocaml-compiler: 5.1.x
 
     runs-on: ${{ matrix.os }}