diff --git a/pkgs/development/ocaml-modules/mtime/default.nix b/pkgs/development/ocaml-modules/mtime/default.nix
index 73f84886cc5..f4e3586b43c 100644
--- a/pkgs/development/ocaml-modules/mtime/default.nix
+++ b/pkgs/development/ocaml-modules/mtime/default.nix
@@ -7,8 +7,8 @@ with lib;
 let param =
   if versionAtLeast ocaml.version "4.03"
   then {
-    version = "1.1.0";
-    sha256 = "1qb4ljwirrc3g8brh97s76rjky2cpmy7zm87y7iqd6pxix52ydk3";
+    version = "1.2.0";
+    sha256 = "0zm1jvqkz3ghznfsm3bbv9q2zinp9grggdf7k9phjazjvny68xb8";
   } else {
     version = "0.8.4";
     sha256 = "1adm8sc3lkjly99hyi5gqnxas748k7h62ljgn8x423nkn8gyp8dh";