diff --git a/humblebundle_downloader/cli.py b/humblebundle_downloader/cli.py
index 2810a02..b964569 100644
--- a/humblebundle_downloader/cli.py
+++ b/humblebundle_downloader/cli.py
@@ -15,7 +15,7 @@ logging.getLogger('urllib3.connectionpool').setLevel(logging.WARNING)
 
 
 def parse_args(args):
-    if args[0].lower() == 'download':
+    if len(args) > 0 and args[0].lower() == 'download':
         args = args[1:]
         raise DeprecationWarning("`download` argument is no longer used")
 
diff --git a/tests/test_cli.py b/tests/test_cli.py
index ae36d4d..bc838d7 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -11,3 +11,9 @@ def test_no_action():
     args = parse_args(['-l', 'some_path', '-c', 'fake_cookie'])
     assert args.library_path == 'some_path'
     assert args.cookie_file == 'fake_cookie'
+
+
+def test_no_args():
+    with pytest.raises(SystemExit) as ex:
+        parse_args([])
+    assert ex.value.code == 2