diff --git a/requirements.txt b/requirements.txt
index dd2a67c..76dac78 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -92,7 +92,7 @@ ply==3.10
 prettytable==0.7.2
 promise==2.1
 prompt-toolkit==1.0.15
-protobuf==3.5.1
+protobuf==3.15.0
 psutil==5.4.0
 ptyprocess==0.5.2
 py==1.4.34