diff --git a/fastapi_users_db_beanie/__init__.py b/fastapi_users_db_beanie/__init__.py
index 6a73f7f..57ddaaa 100644
--- a/fastapi_users_db_beanie/__init__.py
+++ b/fastapi_users_db_beanie/__init__.py
@@ -23,9 +23,11 @@ class BeanieBaseUser(BaseModel):
     class Settings:
         email_collation = Collation("en", strength=2)
         indexes = [
-            IndexModel("email", unique=True),
             IndexModel(
-                "email", name="case_insensitive_email_index", collation=email_collation
+                "email",
+                name="case_insensitive_unique_email_index",
+                collation=email_collation,
+                unique=True,
             ),
         ]