diff --git a/dune-project b/dune-project
index 5cab397dcaeb35575b0d2d93f82f17e8d6c733c1..39ccdc4b71305f4c2a172f09876449b455df19ba 100644
--- a/dune-project
+++ b/dune-project
@@ -15,7 +15,7 @@
  (name clangml-transforms)
  (synopsis "Code transformers for clangml")
  (depends
-  (ocaml (and (>= 4.04.0) (< 4.11.0)))
+  (ocaml (and (>= 4.03.0) (< 4.11.0)))
   (dune (>= 2.2.0))
   (clangml (>= 4.1.0))
   (dolog (>= 4.0.0))))