diff --git a/newsfragments/518.feature.rst b/newsfragments/518.feature.rst
index deb06cff..28d41854 100644
--- a/newsfragments/518.feature.rst
+++ b/newsfragments/518.feature.rst
@@ -1 +1 @@
-implemented ``timed_cache`` module which will allow to implement ``seen_ttl`` configurable param for all pubsub and it's derived protocol.
+implemented ``timed_cache`` module which will allow to implement ``seen_ttl`` configurable param for pubsub and protocols extending it.