diff --git a/requirements.txt b/requirements.txt
index 8945474..3f63108 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ joblib==1.1.0
 JPype1==1.3.0
 numpy==1.22.3
 Pillow==9.1.0
-protobuf==3.20.0
+protobuf==3.20.2
 pyhanlp==0.1.84
 requests==2.27.1
 scikit-learn==1.0.2