diff --git a/backend/app/extensions/archive.py b/backend/app/extensions/archive.py
index 58640ff..b74c729 100644
--- a/backend/app/extensions/archive.py
+++ b/backend/app/extensions/archive.py
@@ -82,6 +82,8 @@ def install_zip(data: bytes, kind: str, storage: Path, install: Callable[[Path],
                         if written > MAX_EXPANDED_BYTES:
                             raise ApiError(413, 'EXTENSION_ZIP_TOO_LARGE', 'ZIP 解压后不能超过 50 MiB。')
                         output.write(chunk)
+                if (entry.external_attr >> 16) & 0o111:
+                    target.chmod(0o755)
             manifest = f'{kind}.yaml'
             root = destination
             if not (root / manifest).is_file():
diff --git a/backend/extensions/community/build_packages.py b/backend/extensions/community/build_packages.py
index d6d9f5e..c57e2f1 100644
--- a/backend/extensions/community/build_packages.py
+++ b/backend/extensions/community/build_packages.py
@@ -42,7 +42,7 @@ def build(output: Path | None = None) -> dict:
             for name in sorted(files):
                 info = zipfile.ZipInfo(f'{identity}/{name}', date_time=(1980, 1, 1, 0, 0, 0))
                 info.create_system = 3
-                info.external_attr = 0o100644 << 16
+                info.external_attr = (0o100755 if name == 'markdown-workbench.exe' else 0o100644) << 16
                 info.compress_type = zipfile.ZIP_DEFLATED
                 content = generated.get(name)
                 if content is None: