diff --git a/requirements.txt b/requirements.txt
index 817e01b..6f8853e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ Flask==1.1.1
 influxdb==4.1.1
 paho-mqtt==1.3.0
 pika==1.1.0
-protobuf==3.4.0
+protobuf==3.15.0
 pymongo==3.10.1
 requests==2.22.0
 requests-oauthlib==1.2.0