diff --git a/samples/langchain_on_vertexai/requirements.txt b/samples/langchain_on_vertexai/requirements.txt
index f841a4c3..a9090cab 100644
--- a/samples/langchain_on_vertexai/requirements.txt
+++ b/samples/langchain_on_vertexai/requirements.txt
@@ -2,4 +2,4 @@ google-cloud-aiplatform[reasoningengine,langchain]==1.120.0
 google-cloud-resource-manager==1.14.2
 langchain-community==0.3.31
 langchain-google-cloud-sql-pg==0.14.1
-langchain-google-vertexai==2.1.2
+langchain-google-vertexai==3.0.0