diff --git a/2_YoloV3_Execute/requirements.txt b/2_YoloV3_Execute/requirements.txt
index 9ca6d38..dfee0cb 100644
--- a/2_YoloV3_Execute/requirements.txt
+++ b/2_YoloV3_Execute/requirements.txt
@@ -64,7 +64,7 @@ path.py==11.0.1
 pickleshare==0.7.4
 Pillow==5.2.0
 prompt-toolkit==1.0.15
-protobuf==3.5.2
+protobuf==3.15.0
 psutil==5.4.6
 pycodestyle==2.4.0
 pycparser==2.18