diff --git a/nix/ocaml-versions.txt b/nix/ocaml-versions.txt
index 7bba7bffaeb5b131208b85dddcd0fe71866a9fb2..8341d84a4055ebccd34f34f13817bb9661ec2594 100644
--- a/nix/ocaml-versions.txt
+++ b/nix/ocaml-versions.txt
@@ -1,3 +1,4 @@
 4.14.2
 5.1.1
-5.2.0
+5.2.1
+5.3.0