diff --git a/pkgs/development/python-modules/cmaes/default.nix b/pkgs/development/python-modules/cmaes/default.nix
index 41a0a886729f..133304f68a4e 100644
--- a/pkgs/development/python-modules/cmaes/default.nix
+++ b/pkgs/development/python-modules/cmaes/default.nix
@@ -11,7 +11,7 @@
 
 buildPythonPackage rec {
   pname = "cmaes";
-  version = "0.11.1";
+  version = "0.12.0";
   format = "pyproject";
 
   disabled = pythonOlder "3.7";
@@ -20,7 +20,7 @@ buildPythonPackage rec {
     owner = "CyberAgentAILab";
     repo = "cmaes";
     tag = "v${version}";
-    hash = "sha256-u2CgU9n8N9AMxfMBbDbnYzBMdl/IGOLTxOeh8RlnB/Y=";
+    hash = "sha256-Ev3Nes0iJIhndWfVzDVLpoV4TIFaHMOEUgPPdlyU0+s=";
   };
 
   nativeBuildInputs = [ setuptools ];
@@ -42,7 +42,7 @@ buildPythonPackage rec {
   meta = with lib; {
     description = "Python library for CMA evolution strategy";
     homepage = "https://github.com/CyberAgentAILab/cmaes";
-    changelog = "https://github.com/CyberAgentAILab/cmaes/releases/tag/v${version}";
+    changelog = "https://github.com/CyberAgentAILab/cmaes/releases/tag/${src.tag}";
     license = licenses.mit;
     maintainers = with maintainers; [ bcdarwin ];
   };