diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index bb8fcf2..de1fbbb 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -18,6 +18,7 @@ llama-index = "0.10.63"
 cachetools = "^5.3.3"
 protobuf = "4.25.4"
 nltk = "^3.8.2"
+jieba = "^0.42.1"
 
 #arize-phoenix = "^4.12.0"
 openinference-instrumentation-llama-index="2.2.3"