diff --git a/lib.py b/lib.py
index 0b1fc07..aff40b4 100644
--- a/lib.py
+++ b/lib.py
@@ -32,6 +32,9 @@ def get_credentials():
     Returns:
         service_account.Credentials: The loaded credentials
     """
+    # OAuth scopes required for Vertex AI API
+    SCOPES = ["https://www.googleapis.com/auth/cloud-platform"]
+
     # Try to load credentials from JSON content directly
     credentials_json = os.getenv("GOOGLE_CREDENTIALS_JSON")
 
@@ -43,7 +46,7 @@ def get_credentials():
             logger.info(f"creds JSON parsed: {credentials_info}")
 
             return service_account.Credentials.from_service_account_info(
-                credentials_info
+                credentials_info, scopes=SCOPES
             )
         except json.JSONDecodeError as e:
             raise ValueError(f"Invalid JSON in GOOGLE_CREDENTIALS_JSON: {e}")
@@ -55,7 +58,7 @@ def get_credentials():
 
     if credentials_path and os.path.exists(credentials_path):
         return service_account.Credentials.from_service_account_file(
-            credentials_path
+            credentials_path, scopes=SCOPES
         )
 
     # If neither is provided, return None to let the client use default credentials