diff --git a/pkgs/development/python-modules/notobuilder/default.nix b/pkgs/development/python-modules/notobuilder/default.nix
index c3bb1fce5b5f..7c3c0f6e826d 100644
--- a/pkgs/development/python-modules/notobuilder/default.nix
+++ b/pkgs/development/python-modules/notobuilder/default.nix
@@ -68,7 +68,7 @@ buildPythonPackage {
   meta = {
     description = "Python module for building Noto fonts";
     homepage = "https://github.com/notofonts/notobuilder";
-    license = lib.licenses.unfree;
+    license = lib.licenses.asl20;
     maintainers = with lib.maintainers; [ jopejoe1 ];
   };
 }