diff --git a/pkgs/development/python-modules/graphql-subscription-manager/default.nix b/pkgs/development/python-modules/graphql-subscription-manager/default.nix
index d453b4c2044f..f1dc974f836d 100644
--- a/pkgs/development/python-modules/graphql-subscription-manager/default.nix
+++ b/pkgs/development/python-modules/graphql-subscription-manager/default.nix
@@ -31,7 +31,7 @@ buildPythonPackage rec {
   meta = {
     description = "Python3 library for graphql subscription manager";
     homepage = "https://github.com/Danielhiversen/PyGraphqlWebsocketManager";
-    license = lib.licenses.mit;
+    license = lib.licenses.gpl3Only;
     maintainers = with lib.maintainers; [ dotlambda ];
   };
 }