diff --git a/requirements.txt b/requirements.txt
index 3b838d3..7847821 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ idna==2.8
 kazoo==2.6.1
 requests==2.22.0
 urllib3==1.25.3
-protobuf==3.8.0
+protobuf==3.18.3
 apscheduler==3.6.0
 asn1crypto==0.24.0
 bcrypt==3.1.6