diff --git a/requirements.txt b/requirements.txt
index a7f047a..59d137a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ idna==2.8
 ipaddress==1.0.17
 keyring==10.1
 keyrings.alt==1.3
-protobuf==3.11.0
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.7
 pytz==2019.3