diff --git a/src/Mod/CAM/Path/Tool/library/serializers/camotics.py b/src/Mod/CAM/Path/Tool/library/serializers/camotics.py
index 8f1f107f9a..4f57acc753 100644
--- a/src/Mod/CAM/Path/Tool/library/serializers/camotics.py
+++ b/src/Mod/CAM/Path/Tool/library/serializers/camotics.py
@@ -49,7 +49,7 @@ tooltemplate = {
 
 class CamoticsLibrarySerializer(AssetSerializer):
     for_class: Type[Asset] = Library
-    extensions: tuple[str] = (".ctbl",)
+    extensions: tuple[str] = (".json",)
     mime_type: str = "application/json"
 
     @classmethod