diff --git a/application/api/answer/routes/stream.py b/application/api/answer/routes/stream.py
index 7583aa0b..1c3f1778 100644
--- a/application/api/answer/routes/stream.py
+++ b/application/api/answer/routes/stream.py
@@ -80,6 +80,12 @@ class StreamResource(Resource, BaseAnswerResource):
         processor = StreamProcessor(data, decoded_token)
         try:
             processor.initialize()
+            if not processor.decoded_token:
+                return Response(
+                    self.error_stream_generate("Unauthorized"),
+                    status=401,
+                    mimetype="text/event-stream",
+                )
 
             docs_together, docs_list = processor.pre_fetch_docs(data["question"])
             tools_data = processor.pre_fetch_tools()
diff --git a/application/api/answer/services/conversation_service.py b/application/api/answer/services/conversation_service.py
index 5d37e32b..09baf3d1 100644
--- a/application/api/answer/services/conversation_service.py
+++ b/application/api/answer/services/conversation_service.py
@@ -62,6 +62,8 @@ class ConversationService:
         attachment_ids: Optional[List[str]] = None,
     ) -> str:
         """Save or update a conversation in the database"""
+        if decoded_token is None:
+            raise ValueError("Invalid or missing authentication token")
         user_id = decoded_token.get("sub")
         if not user_id:
             raise ValueError("User ID not found in token")
diff --git a/application/api/user/sharing/routes.py b/application/api/user/sharing/routes.py
index fac8bda0..31436a2c 100644
--- a/application/api/user/sharing/routes.py
+++ b/application/api/user/sharing/routes.py
@@ -220,8 +220,23 @@ class GetPubliclySharedConversations(Resource):
                 shared
                 and "conversation_id" in shared
             ):
-                # conversation_id is now stored as an ObjectId, not a DBRef
+                # Handle DBRef (legacy), ObjectId, dict, and string formats for conversation_id
                 conversation_id = shared["conversation_id"]
+                if isinstance(conversation_id, DBRef):
+                    conversation_id = conversation_id.id
+                elif isinstance(conversation_id, dict):
+                    # Handle dict representation of DBRef (e.g., {"$ref": "...", "$id": "..."})
+                    if "$id" in conversation_id:
+                        conv_id = conversation_id["$id"]
+                        # $id might be a dict like {"$oid": "..."} or a string
+                        if isinstance(conv_id, dict) and "$oid" in conv_id:
+                            conversation_id = ObjectId(conv_id["$oid"])
+                        else:
+                            conversation_id = ObjectId(conv_id)
+                    elif "_id" in conversation_id:
+                        conversation_id = ObjectId(conversation_id["_id"])
+                elif isinstance(conversation_id, str):
+                    conversation_id = ObjectId(conversation_id)
                 conversation = conversations_collection.find_one(
                     {"_id": conversation_id}
                 )
diff --git a/application/requirements.txt b/application/requirements.txt
index 0e006768..82ee2b75 100644
--- a/application/requirements.txt
+++ b/application/requirements.txt
@@ -17,7 +17,7 @@ esutils==1.0.1
 elevenlabs==2.27.0
 Flask==3.1.2
 faiss-cpu==1.13.2
-fastmcp==2.13.3
+fastmcp==2.14.0
 flask-restx==1.3.2
 google-genai==1.54.0
 google-api-python-client==2.187.0
@@ -34,12 +34,12 @@ joblib==1.5.3
 jsonpatch==1.33
 jsonpointer==3.0.0
 kombu==5.6.1
-langchain==1.1.3
+langchain==1.2.0
 langchain-community==0.4.1
 langchain-core==1.2.5
 langchain-openai==1.1.6
 langchain-text-splitters==1.1.0
-langsmith==0.5.0
+langsmith==0.5.1
 lazy-object-proxy==1.12.0
 lxml==6.0.2
 markupsafe==3.0.3
@@ -53,7 +53,7 @@ openai==2.14.0
 openapi3-parser==1.1.22
 orjson==3.11.5
 packaging==24.2
-pandas==2.2.3
+pandas==2.3.3
 openpyxl==3.1.5
 pathable==0.4.4
 pillow
@@ -70,7 +70,7 @@ pymongo==4.15.5
 pypdf==6.5.0
 python-dateutil==2.9.0.post0
 python-dotenv
-python-jose==3.4.0
+python-jose==3.5.0
 python-pptx==1.0.2
 redis==7.1.0
 referencing>=0.28.0,<0.31.0