diff --git a/Dockerfile b/Dockerfile
index 47f7e65..80d2ed6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,12 +6,12 @@ WORKDIR /src
 
 # 先复制 csproj，单独 restore（利用层缓存）
 COPY gitea-mcp.csproj .
-RUN --mount=type=cache,target=/root/.nuget/packages \
+RUN --mount=type=cache,target=/root/.nuget/packages,sharing=locked \
     dotnet restore gitea-mcp.csproj
 
 # 复制剩余源码并发布
 COPY . .
-RUN --mount=type=cache,target=/root/.nuget/packages \
+RUN --mount=type=cache,target=/root/.nuget/packages,sharing=locked \
     dotnet publish gitea-mcp.csproj \
     -c Release \
     -o /app/publish \