diff --git a/endpoints/signup.post.py b/endpoints/signup.post.py
index 05da3da..2a692ce 100644
--- a/endpoints/signup.post.py
+++ b/endpoints/signup.post.py
@@ -3,7 +3,7 @@ from sqlalchemy.orm import Session
 from core.database import get_db
 from models.user import User
 from schemas.user import UserCreate, UserResponse
-from helpers.user_helpers import create_user
+from helpers.user_helpers import create_user, get_user_by_email
 
 router = APIRouter()
 
@@ -12,5 +12,12 @@ async def signup(
     user_data: UserCreate,
     db: Session = Depends(get_db)
 ):
+    existing_user = get_user_by_email(db, user_data.email)
+    if existing_user:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Email already registered"
+        )
+    
     new_user = create_user(db, user_data)
     return new_user
\ No newline at end of file