diff --git a/src/_locales/en/messages.json b/src/_locales/en/messages.json
index 707d631d8..3a00b4fa1 100644
--- a/src/_locales/en/messages.json
+++ b/src/_locales/en/messages.json
@@ -1046,7 +1046,7 @@
     "description": "Shown in the About pane"
   },
   "aboutCDNsInfo": {
-    "message": "A randomly picked CDN is used when a filter list needs to be updated",
+    "message": "A randomly picked CDN is used when a filter list needs to be updated.",
     "description": "Shown in the About pane"
   },
   "aboutBackupDataButton": {