diff --git a/README.md b/README.md
index ba4d0ec..224f158 100644
--- a/README.md
+++ b/README.md
@@ -191,6 +191,10 @@ The types of notifications to send are passed via the comma-separated option `--
 * `email` to send notifications via e-mail
 * `slack` to send notifications through a Slack webhook
 
+### Settings
+
+* `--notifications-level` (env. `WATCHTOWER_NOTIFICATIONS_LEVEL`): Controls the log level which is used for the notifications. If omitted, the default log level is `info`. Possible values are: `panic`, `fatal`, `error`, `warn`, `info` or `debug`.
+
 ### Notifications via E-Mail
 
 To receive notifications by email, the following command-line options, or their corresponding environment variables, can be set:
diff --git a/main.go b/main.go
index 38b1269..962ab33 100644
--- a/main.go
+++ b/main.go
@@ -96,6 +96,12 @@ func main() {
 			Usage:  "notification types to send (valid: email, slack)",
 			EnvVar: "WATCHTOWER_NOTIFICATIONS",
 		},
+		cli.StringFlag{
+			Name:   "notifications-level",
+			Usage:  "The log level used for sending notifications. Possible values: \"panic\", \"fatal\", \"error\", \"warn\", \"info\" or \"debug\"",
+			EnvVar: "WATCHTOWER_NOTIFICATIONS_LEVEL",
+			Value:  "info",
+		},
 		cli.StringFlag{
 			Name:   "notification-email-from",
 			Usage:  "Address to send notification e-mails from",
@@ -147,12 +153,6 @@ func main() {
 			EnvVar: "WATCHTOWER_NOTIFICATION_SLACK_IDENTIFIER",
 			Value:  "watchtower",
 		},
-		cli.StringFlag{
-			Name:   "notification-slack-level",
-			Usage:  "The log level used for sending notifications through Slack. Default if omitted is \"info\". Possible values: \"panic\",\"fatal\",\"error\",\"warn\",\"info\" or \"debug\"",
-			EnvVar: "WATCHTOWER_NOTIFICATION_SLACK_LEVEL",
-			Value:  "info",
-		},
 	}
 
 	if err := app.Run(os.Args); err != nil {
diff --git a/notifications/email.go b/notifications/email.go
index 54a2f9f..5f84ca5 100644
--- a/notifications/email.go
+++ b/notifications/email.go
@@ -28,9 +28,10 @@ type emailTypeNotifier struct {
 	Port                   int
 	tlsSkipVerify          bool
 	entries                []*log.Entry
+	logLevels              []log.Level
 }
 
-func newEmailNotifier(c *cli.Context) typeNotifier {
+func newEmailNotifier(c *cli.Context, acceptedLogLevels []log.Level) typeNotifier {
 	n := &emailTypeNotifier{
 		From:          c.GlobalString("notification-email-from"),
 		To:            c.GlobalString("notification-email-to"),
@@ -39,6 +40,7 @@ func newEmailNotifier(c *cli.Context) typeNotifier {
 		Password:      c.GlobalString("notification-email-server-password"),
 		Port:          c.GlobalInt("notification-email-server-port"),
 		tlsSkipVerify: c.GlobalBool("notification-email-server-tls-skip-verify"),
+		logLevels:     acceptedLogLevels,
 	}
 
 	log.AddHook(n)
@@ -112,14 +114,7 @@ func (e *emailTypeNotifier) SendNotification() {
 }
 
 func (e *emailTypeNotifier) Levels() []log.Level {
-	// TODO: Make this configurable.
-	return []log.Level{
-		log.PanicLevel,
-		log.FatalLevel,
-		log.ErrorLevel,
-		log.WarnLevel,
-		log.InfoLevel,
-	}
+	return e.logLevels
 }
 
 func (e *emailTypeNotifier) Fire(entry *log.Entry) error {
diff --git a/notifications/notifier.go b/notifications/notifier.go
index ab635bb..274811b 100644
--- a/notifications/notifier.go
+++ b/notifications/notifier.go
@@ -1,6 +1,7 @@
 package notifications
 
 import (
+	"github.com/johntdyer/slackrus"
 	log "github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
 )
@@ -19,15 +20,22 @@ type Notifier struct {
 func NewNotifier(c *cli.Context) *Notifier {
 	n := &Notifier{}
 
+	logLevel, err := log.ParseLevel(c.GlobalString("notifications-level"))
+	if err != nil {
+		log.Fatalf("Notifications invalid log level: %s", err.Error())
+	}
+
+	acceptedLogLevels := slackrus.LevelThreshold(logLevel)
+
 	// Parse types and create notifiers.
 	types := c.GlobalStringSlice("notifications")
 	for _, t := range types {
 		var tn typeNotifier
 		switch t {
 		case emailType:
-			tn = newEmailNotifier(c)
+			tn = newEmailNotifier(c, acceptedLogLevels)
 		case slackType:
-			tn = newSlackNotifier(c)
+			tn = newSlackNotifier(c, acceptedLogLevels)
 		default:
 			log.Fatalf("Unknown notification type %q", t)
 		}
diff --git a/notifications/slack.go b/notifications/slack.go
index 3b17354..dd44f29 100644
--- a/notifications/slack.go
+++ b/notifications/slack.go
@@ -14,17 +14,12 @@ type slackTypeNotifier struct {
 	slackrus.SlackrusHook
 }
 
-func newSlackNotifier(c *cli.Context) typeNotifier {
-	logLevel, err := log.ParseLevel(c.GlobalString("notification-slack-level"))
-	if err != nil {
-		log.Fatalf("Slack notifications: %s", err.Error())
-	}
-
+func newSlackNotifier(c *cli.Context, acceptedLogLevels []log.Level) typeNotifier {
 	n := &slackTypeNotifier{
 		SlackrusHook: slackrus.SlackrusHook{
 			HookURL:        c.GlobalString("notification-slack-hook-url"),
 			Username:       c.GlobalString("notification-slack-identifier"),
-			AcceptedLevels: slackrus.LevelThreshold(logLevel),
+			AcceptedLevels: acceptedLogLevels,
 		},
 	}