diff --git a/surfsense_backend/.env.example b/surfsense_backend/.env.example
index 0b4e2cf..a825acc 100644
--- a/surfsense_backend/.env.example
+++ b/surfsense_backend/.env.example
@@ -8,6 +8,7 @@ AUTH_TYPE=GOOGLE or LOCAL
 # For Google Auth Only
 GOOGLE_OAUTH_CLIENT_ID=924507538m
 GOOGLE_OAUTH_CLIENT_SECRET=GOCSV
+GOOGLE_GMAIL_REDIRECT_URI=http://localhost:8000/api/v1/auth/google/gmail/connector/callback
 
 # Embedding Model
 EMBEDDING_MODEL=mixedbread-ai/mxbai-embed-large-v1
diff --git a/surfsense_backend/app/app.py b/surfsense_backend/app/app.py
index 17f9082..1766c0c 100644
--- a/surfsense_backend/app/app.py
+++ b/surfsense_backend/app/app.py
@@ -1,3 +1,9 @@
+import os
+
+os.environ["OAUTHLIB_RELAX_TOKEN_SCOPE"] = (
+    "1"  # It is to disbale the error "Invalid token scope" when using Google OAuth with increemental scopes
+)
+
 from contextlib import asynccontextmanager
 
 from fastapi import Depends, FastAPI
diff --git a/surfsense_backend/app/config/__init__.py b/surfsense_backend/app/config/__init__.py
index 48de86d..edb4a17 100644
--- a/surfsense_backend/app/config/__init__.py
+++ b/surfsense_backend/app/config/__init__.py
@@ -47,6 +47,9 @@ class Config:
         GOOGLE_OAUTH_CLIENT_ID = os.getenv("GOOGLE_OAUTH_CLIENT_ID")
         GOOGLE_OAUTH_CLIENT_SECRET = os.getenv("GOOGLE_OAUTH_CLIENT_SECRET")
 
+    # Google Gmail redirect URI
+    GOOGLE_GMAIL_REDIRECT_URI = os.getenv("GOOGLE_GMAIL_REDIRECT_URI")
+
     # LLM instances are now managed per-user through the LLMConfig system
     # Legacy environment variables removed in favor of user-specific configurations