diff --git a/samples/langchain_on_vertexai/requirements.txt b/samples/langchain_on_vertexai/requirements.txt
index 33f932da..324a5b28 100644
--- a/samples/langchain_on_vertexai/requirements.txt
+++ b/samples/langchain_on_vertexai/requirements.txt
@@ -1,5 +1,5 @@
-google-cloud-aiplatform[reasoningengine,langchain]==1.130.0
+google-cloud-aiplatform[reasoningengine]==1.134.0
 google-cloud-resource-manager==1.15.0
-langchain-community==0.3.31
-langchain-google-alloydb-pg==0.13.0
-langchain-google-vertexai==2.1.2
+langchain-community==0.4.1
+langchain-google-alloydb-pg==0.14.0
+langchain-google-vertexai==3.2.1