diff --git a/backend/app/db/session.py b/backend/app/db/session.py
index b09fd32a..38a7e475 100644
--- a/backend/app/db/session.py
+++ b/backend/app/db/session.py
@@ -27,7 +27,7 @@ def _normalize_database_url(database_url: str) -> str:
     if "://" not in database_url:
         return database_url
     scheme, rest = database_url.split("://", 1)
-    if scheme == "postgresql":
+    if scheme in ("postgresql", "postgres"):
         return f"postgresql+psycopg://{rest}"
     return database_url
 
diff --git a/backend/migrations/env.py b/backend/migrations/env.py
index a5f7cd84..c99306ed 100644
--- a/backend/migrations/env.py
+++ b/backend/migrations/env.py
@@ -31,7 +31,7 @@ def _normalize_database_url(database_url: str) -> str:
     if "://" not in database_url:
         return database_url
     scheme, rest = database_url.split("://", 1)
-    if scheme == "postgresql":
+    if scheme in ("postgresql", "postgres"):
         return f"postgresql+psycopg://{rest}"
     return database_url