diff --git a/src/pydase/utils/serialization/serializer.py b/src/pydase/utils/serialization/serializer.py
index 00bacd3..7867d35 100644
--- a/src/pydase/utils/serialization/serializer.py
+++ b/src/pydase/utils/serialization/serializer.py
@@ -164,7 +164,9 @@ class Serializer:
         }
 
     @staticmethod
-    def _serialize_dict(obj: dict[str, Any], access_path: str = "") -> SerializedDict:
+    def _serialize_dict(
+        obj: dict[str | float, Any], access_path: str = ""
+    ) -> SerializedDict:
         readonly = False
         doc = get_attribute_doc(obj)
         value = {}