diff --git a/pkgs/development/python-modules/dataclasses-json/default.nix b/pkgs/development/python-modules/dataclasses-json/default.nix
index 05f5eb06e098..54047b4817a7 100644
--- a/pkgs/development/python-modules/dataclasses-json/default.nix
+++ b/pkgs/development/python-modules/dataclasses-json/default.nix
@@ -12,7 +12,7 @@
 
 buildPythonPackage rec {
   pname = "dataclasses-json";
-  version = "0.6.5";
+  version = "0.6.6";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
@@ -21,7 +21,7 @@ buildPythonPackage rec {
     owner = "lidatong";
     repo = "dataclasses-json";
     rev = "refs/tags/v${version}";
-    hash = "sha256-YkGxUQgnUB7WfpsZz74b3j/TIqJi2ihsk9Ib05S7uPM=";
+    hash = "sha256-JpZwRln7QC0SO/+8xFxc6xrC+ZBFSHVQ9NJscAO+Lf8=";
   };
 
   postPatch = ''