diff --git a/backend/Dockerfile b/backend/Dockerfile
index 6d8f3f0..317a1e7 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,5 +1,5 @@
 # Simplified Dockerfile for ModernAPI Backend
-FROM mcr.microsoft.com/dotnet/sdk:9.0-alpine AS build
+FROM mcr.microsoft.com/dotnet/sdk:10.0-alpine AS build
 WORKDIR /src
 
 # Copy only production projects (exclude tests for faster builds)
diff --git a/backend/Dockerfile.original.backup b/backend/Dockerfile.original.backup
index 72843d0..0ee512b 100644
--- a/backend/Dockerfile.original.backup
+++ b/backend/Dockerfile.original.backup
@@ -1,5 +1,5 @@
 # Production-ready Dockerfile for ModernAPI Backend
-FROM mcr.microsoft.com/dotnet/sdk:9.0-alpine AS build
+FROM mcr.microsoft.com/dotnet/sdk:10.0-alpine AS build
 WORKDIR /src
 
 # Copy csproj files and restore dependencies (better layer caching)