diff --git a/reqifviewer/Dockerfile b/reqifviewer/Dockerfile
index bf59bb0..01f66b7 100644
--- a/reqifviewer/Dockerfile
+++ b/reqifviewer/Dockerfile
@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1.4
 
-FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
 
 COPY Nuget.Config .
 COPY reqifviewer reqifviewer
@@ -12,7 +12,7 @@ RUN dotnet build "reqifviewer/reqifviewer.csproj" -c Release -o /app/build --no-
 FROM build AS publish
 RUN dotnet publish reqifviewer -c Release -o /app/publish
 
-FROM mcr.microsoft.com/dotnet/aspnet:8.0.7-alpine3.19 AS final
+FROM mcr.microsoft.com/dotnet/aspnet:9.0.1-alpine3.21 AS final
 
 WORKDIR /app
 RUN mkdir /app/logs