diff --git a/requirements.txt b/requirements.txt
index f2ac628..fa4bb76 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ httplib2==0.18.0
 idna==2.9
 msgpack==1.0.0
 multidict==4.7.5
-protobuf==3.11.3
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycparser==2.20