diff --git a/samples/index_tuning_sample/requirements.txt b/samples/index_tuning_sample/requirements.txt
index 3d5ee8dc..5fb33ffb 100644
--- a/samples/index_tuning_sample/requirements.txt
+++ b/samples/index_tuning_sample/requirements.txt
@@ -1,3 +1,3 @@
 langchain-google-alloydb-pg==0.14.0
-langchain==1.2.10
+langchain==1.2.12
 langchain-google-vertexai==3.2.2