diff --git a/Dockerfile b/Dockerfile
index 7541e169..27f3a044 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build stage with security scanning
-FROM mcr.microsoft.com/dotnet/sdk:8.0-alpine AS build
+FROM mcr.microsoft.com/dotnet/sdk:9.0-alpine AS build
 WORKDIR /app
 
 # Install security scanning tools in build stage