diff --git a/requirements.txt b/requirements.txt
index a2af0da..4f95be3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ pickleshare==0.7.5
 pluggy==0.13.1
 prettytable==0.7.2
 prompt-toolkit==2.0.10
-protobuf==3.11.0
+protobuf==3.15.0
 psutil==5.6.7
 ptyprocess==0.6.0
 py==1.8.0