diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3484cf81b6..0cac8b1b32 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,7 @@ on:
 permissions: {}
 
 env:
-  OCAML_DEFAULT_VERSION: 4.10.1
+  OCAML_DEFAULT_VERSION: 4.08.0
   # Add OPAMYES=true to the environment, this is usefill to replace `-y` option
   # in any opam call
   OPAMYES: true
@@ -26,7 +26,8 @@ jobs:
           - macos-latest
           - ubuntu-latest
         ocaml-compiler:
-          - 4.10.1
+          - 4.08.0
+          - 4.14.2
 
     runs-on: ${{ matrix.os }}