diff --git a/NLP/Conversational-Recommendation-BASELINE/requirements.txt b/NLP/Conversational-Recommendation-BASELINE/requirements.txt
index 33c256eb4..5efae0204 100644
--- a/NLP/Conversational-Recommendation-BASELINE/requirements.txt
+++ b/NLP/Conversational-Recommendation-BASELINE/requirements.txt
@@ -28,7 +28,7 @@ opencv-python==4.1.1.26
 paddlepaddle-gpu==1.6.1.post97
 Pillow==6.2.0
 prettytable==0.7.2
-protobuf==3.10.0
+protobuf==3.15.0
 pyglet==1.3.2
 pyparsing==2.4.2
 python-dateutil==2.8.0