diff --git a/Dockerfile b/Dockerfile
index cd94e0a7..d528f621 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # https://hub.docker.com/_/microsoft-dotnet-core
-FROM mcr.microsoft.com/dotnet/sdk:7.0-alpine AS build
+FROM mcr.microsoft.com/dotnet/sdk:9.0-alpine AS build
 WORKDIR /source
 ARG GIT_COMMIT_SHA
 ENV ASPNETCORE_URLS=http://+:8080