diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 8ade115..624aa36 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -18,7 +18,7 @@ jobs:
         os: [macos-latest, ubuntu-latest]
         ocaml-compiler:
           [
-            "4.14.1",
+            "4.14.1", "5.2.1"
           ]
 
     steps: