diff --git a/requirements.txt b/requirements.txt
index c3b85f2..fda886c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -98,7 +98,7 @@ pickleshare==0.7.4
 Pillow==4.0.0
 ply==3.9
 prompt-toolkit==1.0.9
-protobuf==3.3.0
+protobuf==3.15.0
 psutil==5.0.1
 ptyprocess==0.5.1
 py==1.4.32