diff --git a/cmd/opts/opts.go b/cmd/opts/opts.go
index c3928cf..0ed7633 100644
--- a/cmd/opts/opts.go
+++ b/cmd/opts/opts.go
@@ -2,6 +2,7 @@ package opts
 
 var (
 	LogLevel       string
+	BeaconNode     string
 	BeaconChainAPI string
 	MetricsPort    string
 	SlackURL       string
diff --git a/cmd/root.go b/cmd/root.go
index 35a6c6a..f51496d 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -123,6 +123,7 @@ func Execute() error {
 
 func init() {
 	rootCmd.PersistentFlags().StringVarP(&opts.LogLevel, "log-level", "l", "info", "log level (error, warn, info, debug, trace)")
+	rootCmd.PersistentFlags().StringVar(&opts.BeaconNode, "beacon-node", "localhost:4000", "Prysm beacon node GRPC address")
 	rootCmd.PersistentFlags().StringVar(&opts.BeaconChainAPI, "beacon-chain-api", "localhost:3500", "Beacon Chain API HTTP address")
 	rootCmd.PersistentFlags().StringVar(&opts.MetricsPort, "metrics-port", "1337", "Metrics port to expose metrics for Prometheus")
 	rootCmd.PersistentFlags().StringVar(&opts.SlackURL, "slack-url", "", "Slack Webhook URL")