diff --git a/pkgs/development/python-modules/mypy-protobuf/default.nix b/pkgs/development/python-modules/mypy-protobuf/default.nix
index 5cc192313ac..5eda75d9c7f 100644
--- a/pkgs/development/python-modules/mypy-protobuf/default.nix
+++ b/pkgs/development/python-modules/mypy-protobuf/default.nix
@@ -2,11 +2,11 @@
 
 buildPythonApplication rec {
   pname = "mypy-protobuf";
-  version = "1.20";
+  version = "1.21";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "03j2i9vhpdxbvwlqg6zghlzzq46s1x2jbx20fwninb6kss0ps3rg";
+    sha256 = "0eb8db49b014d1082f370a39eeaf272d1cc9978f728b64ee6fcc822d00a8793c";
   };
 
   propagatedBuildInputs = [ protobuf ];