diff --git a/pkgs/development/python-modules/multidict/default.nix b/pkgs/development/python-modules/multidict/default.nix
index 7f731d7bb8c7..75f50f00d240 100644
--- a/pkgs/development/python-modules/multidict/default.nix
+++ b/pkgs/development/python-modules/multidict/default.nix
@@ -13,14 +13,14 @@
 
 buildPythonPackage rec {
   pname = "multidict";
-  version = "6.4.4";
+  version = "6.6.3";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "aio-libs";
     repo = "multidict";
     tag = "v${version}";
-    hash = "sha256-crnWaThjymY0nbY4yvD+wX20vQcBkPrFAI+UkexNAbo=";
+    hash = "sha256-AB35kVgKizzPi3r4tDVQ7vI50Xsb2BeBp3rFh+UOXQc=";
   };
 
   postPatch = ''