diff --git a/docs/en/samples/pre_post_processing/python/langchain/requirements.txt b/docs/en/samples/pre_post_processing/python/langchain/requirements.txt
index 134e24a8c6..5638e0c108 100644
--- a/docs/en/samples/pre_post_processing/python/langchain/requirements.txt
+++ b/docs/en/samples/pre_post_processing/python/langchain/requirements.txt
@@ -1,2 +1,3 @@
 langchain==1.2.6
-toolbox-langchain==0.5.7
\ No newline at end of file
+langchain-google-vertexai==3.2.2
+toolbox-langchain==0.5.8
\ No newline at end of file