diff --git a/__init__.py b/ezzdl/__init__.py
similarity index 100%
rename from __init__.py
rename to ezzdl/__init__.py
diff --git a/download.py b/ezzdl/download.py
similarity index 97%
rename from download.py
rename to ezzdl/download.py
index 6c2ae63..d92f22f 100644
--- a/download.py
+++ b/ezzdl/download.py
@@ -58,7 +58,7 @@ def copy_url(task_id: TaskID, url: str, path: str) -> None:
     print(f"[#1d4b6e][{strftime('%H:%M:%S')}][/] [#8dc789]Downloaded {os.path.abspath(path)}[/]")
 
 
-def dl(urls, dest_dir: str):
+def dl(urls: list, dest_dir: str = ".") -> None:
     if not os.path.isdir(dest_dir):
         os.makedirs(dest_dir, exist_ok=True)
     with progress:
diff --git a/setup.py b/setup.py
index df2709b..94963e7 100644
--- a/setup.py
+++ b/setup.py
@@ -5,12 +5,11 @@ with open("README.md", "r") as fh:
 
 setup(
     name="ezzdl",
-    version="1.0.0",
-    scripts=["download.py"],
+    version="3.0.0",
     author="BarsTiger",
     description="Cool download manager based on rich and its sample code",
     long_description=long_description,
-    py_modules=["ezzdl"],
+    packages=["ezzdl"],
     license='MIT',
     url='https://github.com/BarsTiger/ezzdl',
     long_description_content_type="text/markdown",