diff --git a/tutorials/pub-sub/csharp-subscriber/Dockerfile b/tutorials/pub-sub/csharp-subscriber/Dockerfile
index fc2f1bf5a..e7c0c2a1b 100644
--- a/tutorials/pub-sub/csharp-subscriber/Dockerfile
+++ b/tutorials/pub-sub/csharp-subscriber/Dockerfile
@@ -1,7 +1,6 @@
 # Note: we cannot do a staged dotnet docker build here for arm/arm64. 
 
-# Build runtime image
-FROM mcr.microsoft.com/dotnet/aspnet:7.0
+FROM mcr.microsoft.com/dotnet/aspnet:8.0
 WORKDIR /app
 COPY  /out .
-ENTRYPOINT ["dotnet", "csharp-subscriber.dll"]
\ No newline at end of file
+ENTRYPOINT ["dotnet", "csharp-subscriber.dll"]