diff --git a/examples/dotnet/Dockerfile b/examples/dotnet/Dockerfile
index 36fbae8..2a70e1c 100644
--- a/examples/dotnet/Dockerfile
+++ b/examples/dotnet/Dockerfile
@@ -1,11 +1,11 @@
-FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
+FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS base
 WORKDIR /app
 EXPOSE 8083
 
 ENV ASPNETCORE_URLS=http://+:8083
 
 USER app
-FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:9.0 AS build
 ARG configuration=Release
 WORKDIR /src
 COPY ["rolldice.csproj", "/"]