diff --git a/requirements.txt b/requirements.txt
index 2412d12..501f9e9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -63,7 +63,7 @@ passlib==1.7.1
 pexpect==4.2.1
 Pillow==4.2.1
 plotly==2.0.14
-protobuf==3.5.0.post1
+protobuf==3.15.0
 ptyprocess==0.5.2
 pyasn1==0.4.2
 pyasn1-modules==0.2.1