diff --git a/Dockerfile.prebuilt b/Dockerfile.prebuilt
index e0683f4..5431388 100644
--- a/Dockerfile.prebuilt
+++ b/Dockerfile.prebuilt
@@ -8,6 +8,9 @@ RUN apk add --no-cache ca-certificates tzdata
 
 WORKDIR /app
 COPY server-linux-amd64 /app/server
+# 从 Windows 传上来的文件没有执行位（644），必须显式补上，否则容器启动报
+# exec: "/app/server": permission denied
+RUN chmod +x /app/server
 COPY configs ./configs
 
 RUN mkdir -p /app/uploads