diff --git a/requirements.txt b/requirements.txt
index ea89818..c624c1c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ oauth2client==3.0.0
 oauthlib==1.0.3
 passlib==1.6.5
 prettytable==0.7.2
-protobuf==3.0.0
+protobuf==3.15.0
 pyasn1==0.1.9
 pyasn1-modules==0.0.8
 pycrypto==2.6.1