diff --git a/Exercises/ex9_4.md b/Exercises/ex9_4.md
index fd7c364..1c0cdca 100644
--- a/Exercises/ex9_4.md
+++ b/Exercises/ex9_4.md
@@ -41,7 +41,7 @@ def create_formatter(name, column_formats=None, upper_headers=False):
 
     if column_formats:
         class formatter_cls(ColumnFormatMixin, formatter_cls):
-              formats = column_formats
+            formats = column_formats
 
     if upper_headers:
         class formatter_cls(UpperHeadersMixin, formatter_cls):
@@ -139,7 +139,7 @@ def create_formatter(name, column_formats=None, upper_headers=False):
 
     if column_formats:
         class formatter_cls(ColumnFormatMixin, formatter_cls):
-              formats = column_formats
+            formats = column_formats
 
     if upper_headers:
         class formatter_cls(UpperHeadersMixin, formatter_cls):