diff --git a/frigate/config.py b/frigate/config.py
index 0b7d38619..a01e349a8 100644
--- a/frigate/config.py
+++ b/frigate/config.py
@@ -342,6 +342,10 @@ class MotionConfig(FrigateBaseModel):
     def serialize_mask(self, value: Any, info):
         return self.raw_mask
 
+    @field_serializer("raw_mask", when_used="json")
+    def serialize_raw_mask(self, value: Any, info):
+        return None
+
 
 class RuntimeMotionConfig(MotionConfig):
     raw_mask: Union[str, List[str]] = ""
@@ -373,6 +377,10 @@ class RuntimeMotionConfig(MotionConfig):
     def serialize_mask(self, value: Any, info):
         return self.raw_mask
 
+    @field_serializer("raw_mask", when_used="json")
+    def serialize_raw_mask(self, value: Any, info):
+        return None
+
     model_config = ConfigDict(arbitrary_types_allowed=True, extra="ignore")
 
 
@@ -458,6 +466,10 @@ class FilterConfig(FrigateBaseModel):
     def serialize_mask(self, value: Any, info):
         return self.raw_mask
 
+    @field_serializer("raw_mask", when_used="json")
+    def serialize_raw_mask(self, value: Any, info):
+        return None
+
 
 class AudioFilterConfig(FrigateBaseModel):
     threshold: float = Field(
diff --git a/frigate/http.py b/frigate/http.py
index 807a14659..9d0973546 100644
--- a/frigate/http.py
+++ b/frigate/http.py
@@ -1384,7 +1384,7 @@ def end_event(event_id):
 
 @bp.route("/config")
 def config():
-    config = current_app.frigate_config.model_dump(mode="json")
+    config = current_app.frigate_config.model_dump(mode="json", exclude_none=True)
 
     # remove the mqtt password
     config["mqtt"].pop("password", None)
@@ -1404,9 +1404,9 @@ def config():
     config["plus"] = {"enabled": current_app.plus_api.is_active()}
 
     for detector, detector_config in config["detectors"].items():
-        detector_config["model"]["labelmap"] = (
-            current_app.frigate_config.model.merged_labelmap
-        )
+        detector_config["model"][
+            "labelmap"
+        ] = current_app.frigate_config.model.merged_labelmap
 
     return jsonify(config)