diff --git a/rustfmt.toml b/rustfmt.toml
index ae0311c..fb4a098 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1,3 +1,5 @@
+max_width = 100
 hard_tabs = true
 newline_style = "unix"
 use_try_shorthand = true
+edition = "2018"