diff --git a/pkgs/development/compilers/ocaml/4.13.nix b/pkgs/development/compilers/ocaml/4.13.nix
index 256242e9cbb5..4bfa949fa885 100644
--- a/pkgs/development/compilers/ocaml/4.13.nix
+++ b/pkgs/development/compilers/ocaml/4.13.nix
@@ -1,6 +1,6 @@
 import ./generic.nix {
   major_version = "4";
   minor_version = "13";
-  patch_version = "0";
-  sha256 = "sha256:1f7gnndzs6qcyy2gnzalnhm808pifxhvxg2qp5dnsziz6li7x303";
+  patch_version = "1";
+  sha256 = "sha256:1s7xwqidpjwfhnpfma4nb93gxfr7g9jfn03s1j03iyavmpgph7ck";
 }