diff --git a/dash-example/requirements.txt b/dash-example/requirements.txt
index b91fe66..968f42f 100644
--- a/dash-example/requirements.txt
+++ b/dash-example/requirements.txt
@@ -24,7 +24,7 @@ nbformat==4.4.0
 numpy==1.22.0
 pandas==0.23.4
 plotly==3.6.0
-protobuf==3.15.0
+protobuf==3.18.3
 pymortar>=1.0.5
 python-dateutil==2.8.0
 pytz==2018.9