diff --git a/2021/rustfmt.toml b/2021/rustfmt.toml
index a1252c1..7a67ec9 100644
--- a/2021/rustfmt.toml
+++ b/2021/rustfmt.toml
@@ -1,7 +1,8 @@
 newline_style = "Unix"
 max_width = 140
-imports_layout = "Horizontal"
 merge_imports = true
+imports_granularity = "Crate"
 struct_field_align_threshold = 25
 where_single_line = true
 edition = "2021"
+use_small_heuristics = "Max"