diff --git a/Dockerfile b/Dockerfile
index acb14fbf..8dfd1a50 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/dotnet/sdk:8.0-alpine as build
+FROM mcr.microsoft.com/dotnet/sdk:9.0-alpine as build
 WORKDIR /app
 COPY . .
 RUN dotnet restore