diff --git a/python_requirement.txt b/python_requirement.txt
index 4e33d9c..f061852 100644
--- a/python_requirement.txt
+++ b/python_requirement.txt
@@ -91,7 +91,7 @@ ping==0.2
 pip-tools==5.3.1
 pip==19.0.1
 ply==3.11
-protobuf==3.13.0
+protobuf==3.15.0
 psutil==5.7.2
 ptyprocess==0.6.0
 pyalsaaudio==0.9.0