diff --git a/requirements.txt b/requirements.txt
index d213703..4d51f32 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -81,7 +81,7 @@ pickleshare==0.7.4
 Pillow==5.2.0
 prometheus-client==0.3.1
 prompt-toolkit==1.0.15
-protobuf==3.6.1
+protobuf==3.15.0
 psutil==5.4.7
 ptyprocess==0.6.0
 pycodestyle==2.4.0