diff --git a/dash-heroku-master/requirements.txt b/dash-heroku-master/requirements.txt
index a61c9df..3d1d86f 100644
--- a/dash-heroku-master/requirements.txt
+++ b/dash-heroku-master/requirements.txt
@@ -138,7 +138,7 @@ prettytable==0.7.2
 progressbar2==3.34.3
 prometheus-client==0.7.1
 prompt-toolkit==2.0.9
-protobuf==3.9.1
+protobuf==3.18.3
 py==1.8.0
 pycodestyle==2.5.0
 pyforest==0.1.1