diff --git a/subjects/alphamirror/README.md b/subjects/alphamirror/README.md
index 9cc8a414..2508e3de 100644
--- a/subjects/alphamirror/README.md
+++ b/subjects/alphamirror/README.md
@@ -4,7 +4,7 @@
 
 Write a program called `alphamirror` that takes a `string` as argument and displays this `string` after replacing each alphabetical character with the opposite alphabetical character.
 
-The case of the letter stays the same, for example :
+The case of the letter remains unchanged, for example :
 
 'a' becomes 'z', 'Z' becomes 'A'
 'd' becomes 'w', 'M' becomes 'N'