diff --git a/docker/Dockerfile b/docker/Dockerfile
index 42bc585..9443703 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -20,7 +20,7 @@ RUN bun run build
 # ============================================================
 # Stage 2: .NET restore + publish
 # ============================================================
-FROM mcr.microsoft.com/dotnet/sdk:10.0@sha256:548d93f8a18a1acbe6cc127bc4f47281430d34a9e35c18afa80a8d6741c2adc3 AS backend-build
+FROM mcr.microsoft.com/dotnet/sdk:10.0@sha256:ea8bde36c11b6e7eec2656d0e59101d4462f6bd630730f2c8201ed0572b295d5 AS backend-build
 WORKDIR /src
 
 # Copy solution and project files for layer-cached restore