diff --git a/src/blackbox/chroma_query.py b/src/blackbox/chroma_query.py
index f2deaba..8597677 100755
--- a/src/blackbox/chroma_query.py
+++ b/src/blackbox/chroma_query.py
@@ -6,6 +6,10 @@ from .blackbox import Blackbox
 
 import chromadb
 from chromadb.utils import embedding_functions
+from ..utils import chroma_setting
+
+DEFAULT_COLLECTION_ID = "123"
+
 from injector import singleton
 @singleton
 class ChromaQuery(Blackbox):
@@ -24,7 +28,7 @@ class ChromaQuery(Blackbox):
         data = args[0]
         return isinstance(data, list)
 
-    def processing(self, question, collection_id) -> str:
+    def processing(self, question: str, collection_id) -> str:
 
         # load or create collection
         collection = self.client.get_or_create_collection(collection_id, embedding_function=self.embedding_model)
@@ -46,14 +50,13 @@ class ChromaQuery(Blackbox):
             return JSONResponse(content={"error": "json parse error"}, status_code=status.HTTP_400_BAD_REQUEST)
 
         user_question = data.get("question")
-        user_context = data.get("context")
         user_collection_id = data.get("collection_id")
 
         if user_question is None:
             return JSONResponse(content={"error": "question is required"}, status_code=status.HTTP_400_BAD_REQUEST)
 
-        if user_collection_id is None or user_collection_id.isspace():
-            user_collection_id = "123"
+        if user_collection_id is None:
+            user_collection_id = DEFAULT_COLLECTION_ID
 
         return JSONResponse(
             content={"response": self.processing(user_question, user_collection_id)},