diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 4ea86554..327df7a5 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -17,7 +17,9 @@ jobs:
           - windows-latest
         ocaml-compiler:
           # Decision on version matrix informed by https://discuss.ocaml.org/t/which-ocaml-compiler-versions-should-we-run-against-in-ci/7933/2
-          - 4.05.0
+          # But has gradually inched up due to signs of bitrot on earlier versions
+          # such as https://github.com/thierry-martinez/stdcompat/issues/26
+          - 4.08.0
           - 4.14.x
     runs-on: ${{ matrix.os }}
     steps: