diff --git a/docker/Dockerfile b/docker/Dockerfile
index 9ba5033..2b33f1d 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@sha256:8a90a473da5205a16979de99d2fc20975e922c68304f5c79d564e666dc3982fc AS backend-build
+FROM mcr.microsoft.com/dotnet/sdk:10.0@sha256:dc8430e6024d454edadad1e160e1973be3cabbb7125998ef190d9e5c6adf7dbb AS backend-build
 WORKDIR /src
 
 # Copy solution and project files for layer-cached restore