diff --git a/pkgs/development/python-modules/numcodecs/default.nix b/pkgs/development/python-modules/numcodecs/default.nix
index 775cfeded8b4..e49e6e192391 100644
--- a/pkgs/development/python-modules/numcodecs/default.nix
+++ b/pkgs/development/python-modules/numcodecs/default.nix
@@ -11,11 +11,11 @@
 
 buildPythonPackage rec {
   pname = "numcodecs";
-  version = "0.6.3";
+  version = "0.6.4";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "086qwlyi01rpgyyyy8bmhh9i7hpksyz33ldci3wdwmhiblyl362y";
+    sha256 = "ef4843d5db4d074e607e9b85156835c10d006afc10e175bda62ff5412fca6e4d";
   };
 
   nativeBuildInputs = [