diff --git a/40.md b/40.md
index b8140128..2091a37c 100644
--- a/40.md
+++ b/40.md
@@ -50,4 +50,4 @@ Suggested Use Cases
 
 #### One last time, be careful!
 The events could be downloaded by third parties as they are publicly accessible all the time on the relays.
-So don't consider ephemeral messages as a security for your conversations or other uses.
+So don't consider expiring messages as a security feature for your conversations or other uses.