diff --git a/requirements.txt b/requirements.txt
index e4bd88a..306358b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 google-adk[extensions]>=1.28.0
 python-dotenv>=1.0.0
 litellm>=1.80.0
+jieba>=0.42.1