diff --git a/setup.cfg b/setup.cfg
index ff54330..45018e5 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -46,7 +46,7 @@ install_requires =
 	jsonschema>=4
 	pillow
 	pygments
-    pyserial
+	pyserial
 packages = find:
 python_requires = >=3.7