diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 7d636a8f1652..744a4cd63430 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -2355,7 +2355,7 @@ rec {
 
   ocamlPackages_latest = ocamlPackages_5_4;
 
-  ocamlPackages = ocamlPackages_5_3;
+  ocamlPackages = ocamlPackages_5_4;
 
   # We still have packages that rely on unsafe-string, which is deprecated in OCaml 4.06.0.
   # Below are aliases for porting them to the latest versions of the OCaml 4 series.