diff --git a/src/google/adk/memory/vertex_ai_memory_bank_service.py b/src/google/adk/memory/vertex_ai_memory_bank_service.py
index a3fb9b6a..03f4c392 100644
--- a/src/google/adk/memory/vertex_ai_memory_bank_service.py
+++ b/src/google/adk/memory/vertex_ai_memory_bank_service.py
@@ -20,11 +20,7 @@ from typing import TYPE_CHECKING
 
 from google.genai import types
 from typing_extensions import override
-
-try:
-  import vertexai
-except ImportError:
-  from google.cloud.aiplatform import vertexai
+import vertexai
 
 from .base_memory_service import BaseMemoryService
 from .base_memory_service import SearchMemoryResponse