Prepare debian changelog for 3.11.8
diff --git a/debian/changelog b/debian/changelog
index b407fef..55eea82 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+cassandra (3.11.8) unstable; urgency=medium
+
+  * New release
+
+ -- Mick Semb Wever <mck@apache.org>  Fri, 28 Aug 2020 15:12:12 +0200
+
 cassandra (3.11.7) unstable; urgency=medium
 
   * New release