diff --git a/pkgs/development/python-modules/typepy/default.nix b/pkgs/development/python-modules/typepy/default.nix
index dab92fc79dc9..313e04cd4a5f 100644
--- a/pkgs/development/python-modules/typepy/default.nix
+++ b/pkgs/development/python-modules/typepy/default.nix
@@ -13,7 +13,7 @@
 
 buildPythonPackage rec {
   pname = "typepy";
-  version = "1.3.2";
+  version = "1.3.4";
   format = "setuptools";
 
   disabled = pythonOlder "3.7";
@@ -22,7 +22,7 @@ buildPythonPackage rec {
     owner = "thombashi";
     repo = pname;
     tag = "v${version}";
-    hash = "sha256-oIDVjJwapHun0Rk04zOZ4IjAh7qZ2k0BXK6zqFmtVds=";
+    hash = "sha256-lgwXoEtv2nBRKiWQH5bDrAIfikKN3cOqcHLEdnSAMpc=";
   };
 
   propagatedBuildInputs = [ mbstrdecoder ];
@@ -45,7 +45,7 @@ buildPythonPackage rec {
   meta = with lib; {
     description = "Library for variable type checker/validator/converter at a run time";
     homepage = "https://github.com/thombashi/typepy";
-    changelog = "https://github.com/thombashi/typepy/releases/tag/v${version}";
+    changelog = "https://github.com/thombashi/typepy/releases/tag/${src.tag}";
     license = licenses.mit;
     maintainers = with maintainers; [ genericnerdyusername ];
   };