diff --git a/docker/game-realtime/prod/Dockerfile b/docker/game-realtime/prod/Dockerfile
index b2c38924..bdce84b5 100644
--- a/docker/game-realtime/prod/Dockerfile
+++ b/docker/game-realtime/prod/Dockerfile
@@ -2,7 +2,7 @@
 # Game.Realtime 本番用 Dockerfile
 
 # ===== Build Stage =====
-FROM mcr.microsoft.com/dotnet/sdk:9.0.313 AS build
+FROM mcr.microsoft.com/dotnet/sdk:9.0.315 AS build
 WORKDIR /src
 
 COPY Directory.Packages.props ./
@@ -20,7 +20,7 @@ RUN dotnet publish src/Game.Realtime/Game.Realtime.csproj \
     -o /app/publish
 
 # ===== Runtime Stage =====
-FROM mcr.microsoft.com/dotnet/aspnet:9.0.15 AS runtime
+FROM mcr.microsoft.com/dotnet/aspnet:9.0.17 AS runtime
 
 RUN groupadd -r appgroup && useradd -r -g appgroup appuser