diff --git a/backend/requirements/default.txt b/backend/requirements/default.txt
index aa943bff8cc..b9b40acc131 100644
--- a/backend/requirements/default.txt
+++ b/backend/requirements/default.txt
@@ -34,7 +34,7 @@ langchain==0.3.23
 langchain-community==0.3.21
 langchain-core==0.3.51
 langchain-openai==0.2.9
-langchain-text-splitters==0.3.8
+langchain-text-splitters==0.3.9
 langchainhub==0.1.21
 langgraph==0.2.72
 langgraph-checkpoint==2.0.13