diff --git a/letta/llm_api/google_vertex_client.py b/letta/llm_api/google_vertex_client.py
index 3e9c776a..b3ab4148 100644
--- a/letta/llm_api/google_vertex_client.py
+++ b/letta/llm_api/google_vertex_client.py
@@ -1,3 +1,4 @@
+import json
 import uuid
 from typing import List, Optional