diff --git a/cli/alert_add.go b/cli/alert_add.go
index 433afc07..4e7eae7e 100644
--- a/cli/alert_add.go
+++ b/cli/alert_add.go
@@ -68,7 +68,7 @@ func configureAddAlertCmd(cc *kingpin.CmdClause) {
 	addCmd.Arg("labels", "List of labels to be included with the alert").StringsVar(&a.labels)
 	addCmd.Flag("generator-url", "Set the URL of the source that generated the alert").StringVar(&a.generatorURL)
 	addCmd.Flag("start", "Set when the alert should start. RFC3339 format 2006-01-02T15:04:05-07:00").StringVar(&a.start)
-	addCmd.Flag("end", "Set when the alert should should end. RFC3339 format 2006-01-02T15:04:05-07:00").StringVar(&a.end)
+	addCmd.Flag("end", "Set when the alert should end. RFC3339 format 2006-01-02T15:04:05-07:00").StringVar(&a.end)
 	addCmd.Flag("annotation", "Set an annotation to be included with the alert").StringsVar(&a.annotations)
 	addCmd.Action(execWithTimeout(a.addAlert))
 }
diff --git a/ui/app/README.md b/ui/app/README.md
index 2a227b98..8823edaa 100644
--- a/ui/app/README.md
+++ b/ui/app/README.md
@@ -13,7 +13,7 @@ query string containing the following will additionally show silenced alerts.
 http://alertmanager/#/alerts?silenced=true
 ```
 
-In order to to show _only_ silenced alerts, update the query string to hide active alerts.
+In order to show _only_ silenced alerts, update the query string to hide active alerts.
 ```
 http://alertmanager/#/alerts?silenced=true&active=false
 ```