diff --git a/plugins/certs/functions b/plugins/certs/functions
index b64a14a56..a130c993e 100755
--- a/plugins/certs/functions
+++ b/plugins/certs/functions
@@ -26,6 +26,6 @@ get_ssl_hostnames() {
   else
     local SSL_HOSTNAMES=$SSL_HOSTNAME
   fi
-  echo -e "$SSL_HOSTNAMES"
+  echo -e "$SSL_HOSTNAMES" | sort -u
   return 0
 }