diff --git a/pkgs/development/python-modules/orjson/default.nix b/pkgs/development/python-modules/orjson/default.nix
index 55fbb2df8e25..4a579d8766bf 100644
--- a/pkgs/development/python-modules/orjson/default.nix
+++ b/pkgs/development/python-modules/orjson/default.nix
@@ -15,20 +15,20 @@
 
 buildPythonPackage rec {
   pname = "orjson";
-  version = "3.6.3";
+  version = "3.6.4";
   disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "ijl";
     repo = pname;
     rev = version;
-    sha256 = "10clf13bp3fqd9b7n1isrfwz7sngcl1j6birqc1xyg9wzfw1kslj";
+    sha256 = "0xpna70s5v7d4lwsb6ijc0f2rm6p7jqmac9yayx9qb1dasbki6zd";
   };
 
   cargoDeps = rustPlatform.fetchCargoTarball {
     inherit src;
     name = "${pname}-${version}";
-    sha256 = "163rf8k7qb1whjf78i8v5dlyif1sgvd9xkj8li81j45abgzkq86w";
+    sha256 = "0m4f8lc0zwxh4lmxkpxvdd2lc2g3lkq0ymllqbyr31sbxvwnxk56";
   };
 
   format = "pyproject";