diff --git a/src/list_manipulations.rs b/src/list_manipulations.rs
index db0b8d8..5871fec 100644
--- a/src/list_manipulations.rs
+++ b/src/list_manipulations.rs
@@ -28,7 +28,7 @@ pub fn sort_carefully(list: Vec<String>, locale: Locale) -> Vec<String> {
     let collator: Collator = Collator::try_new(&locale.into(), options).unwrap();
 
     let mut newly_sorted_list = list;
-    newly_sorted_list.sort_by(|a, b| collator.compare(a, b));
+    newly_sorted_list.sort_unstable_by(|a, b| collator.compare(a, b));
     newly_sorted_list
 }