diff --git a/requirements.txt b/requirements.txt
index cc9059f0d7..c3562f492d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ PyYAML==5.4.1
 paho-mqtt==1.5.1
 colorama==0.4.4
 tornado==6.1
-protobuf==3.17.0
+protobuf==3.17.3
 tzlocal==2.1
 pytz==2021.1
 pyserial==3.5