diff --git a/mutalyzer/announce.py b/mutalyzer/announce.py
index 5fb484dca78a67e3320ec41be637fbc104279163..d8acbe4de84757bde62b0d326b5a4c0a3fc7ee4d 100644
--- a/mutalyzer/announce.py
+++ b/mutalyzer/announce.py
@@ -18,6 +18,7 @@ def set_announcement(body, url=None):
     if url:
         announcement['url'] = url
 
+    unset_announcement()
     client.hmset('announcement', announcement)