diff --git a/Client.Cloud.Example/Dockerfile b/Client.Cloud.Example/Dockerfile
index c5eeed95..36f00b90 100644
--- a/Client.Cloud.Example/Dockerfile
+++ b/Client.Cloud.Example/Dockerfile
@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/dotnet/core/runtime:2.2 AS base
+FROM mcr.microsoft.com/dotnet/core/runtime:3.1 AS base
 WORKDIR /app
 
 FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS build