diff --git a/packages/bigframes/testing/constraints-3.11.txt b/packages/bigframes/testing/constraints-3.11.txt
index 7bb201d16fcd..d69a5711cb1d 100644
--- a/packages/bigframes/testing/constraints-3.11.txt
+++ b/packages/bigframes/testing/constraints-3.11.txt
@@ -265,7 +265,7 @@ keras-nlp==0.21.1
 keyring==25.6.0
 keyrings.google-artifactregistry-auth==1.1.2
 kiwisolver==1.4.8
-langchain==0.3.27
+langchain==1.3.9
 langchain-core==0.3.72
 langchain-text-splitters==0.3.9
 langcodes==3.5.0