diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6432a697..6eda15e4 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -17,9 +17,10 @@ jobs:
               #- macos-latest
               #- windows-latest
         ocaml-compiler:
-            - '4.05.x'
-            - '4.14.x'
-            - '5.0.x'
+          # FIXME: re-enable 4.05 somehow
+          #- '4.05'
+            - '4.14'
+            - '5.0'
 
     runs-on: ${{ matrix.os }}
     steps: