diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7a85c0f8..3d4ccb9f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 * Add support for User Enrollment (#597)
 * Add support for Signing Profiles (#602)
 * Add support for setting APNS message expiration (#609)
+* Update `mdmctl remove devices -serial` flag to be plural (now `-serials`) (#621)
 
 ## [v1.5.0](https://github.com/micromdm/micromdm/compare/v1.4.0...1.5.0) June 15 2019
 
diff --git a/cmd/mdmctl/get.go b/cmd/mdmctl/get.go
index 95cb6497..a06a9d95 100644
--- a/cmd/mdmctl/get.go
+++ b/cmd/mdmctl/get.go
@@ -102,7 +102,7 @@ Examples:
   mdmctl get devices
 
   # Get a device by serial (TODO implement filtering)
-  mdmctl get devices -serial=C02ABCDEF
+  mdmctl get devices -serials=C02ABCDEF
 `
 	fmt.Println(getUsage)
 	return nil
@@ -121,7 +121,7 @@ func (out *devicesTableOutput) BasicFooter() {
 func (cmd *getCommand) getDevices(args []string) error {
 	flagset := flag.NewFlagSet("devices", flag.ExitOnError)
 	var (
-		flFilterSerials = flagset.String("serials", "", "comma separated list of serials to search")
+		flFilterSerials = flagset.String("serials", "", "device serial, optionally comma-separated")
 	)
 	flagset.Usage = usageFor(flagset, "mdmctl get devices [flags]")
 	if err := flagset.Parse(args); err != nil {
diff --git a/cmd/mdmctl/get_dep_devices.go b/cmd/mdmctl/get_dep_devices.go
index 609d6873..a12f03a1 100644
--- a/cmd/mdmctl/get_dep_devices.go
+++ b/cmd/mdmctl/get_dep_devices.go
@@ -22,14 +22,14 @@ func (out *depDevicesTableOutput) BasicFooter() {
 
 func (cmd *getCommand) getDEPDevices(args []string) error {
 	flagset := flag.NewFlagSet("dep-devices", flag.ExitOnError)
-	flSerials := flagset.String("serials", "", "comma separated list of device serials")
+	flSerials := flagset.String("serials", "", "device serial, optionally comma-separated")
 	flagset.Usage = usageFor(flagset, "mdmctl get dep-devices [flags]")
 	if err := flagset.Parse(args); err != nil {
 		return err
 	}
 	if *flSerials == "" {
 		flagset.Usage()
-		return errors.New("bad input: must provide a comma separated list of DEP serials")
+		return errors.New("bad input: must provide a comma-separated list of DEP serials")
 	}
 	w := tabwriter.NewWriter(os.Stdout, 0, 4, 2, ' ', 0)
 	out := &depDevicesTableOutput{w}
@@ -42,7 +42,7 @@ func (cmd *getCommand) getDEPDevices(args []string) error {
 		return err
 	}
 	for _, d := range resp.Devices {
-		fmt.Fprintf(out.w, "%s\t%s\t%s\t%s\t%s\n", d.SerialNumber, d.Model, d.DeviceFamily,  d.ProfileStatus, d.ProfileUUID)
+		fmt.Fprintf(out.w, "%s\t%s\t%s\t%s\t%s\n", d.SerialNumber, d.Model, d.DeviceFamily, d.ProfileStatus, d.ProfileUUID)
 	}
 	return nil
 }
diff --git a/cmd/mdmctl/remove_blueprints.go b/cmd/mdmctl/remove_blueprints.go
index 9c3d4259..c2c1c6bb 100644
--- a/cmd/mdmctl/remove_blueprints.go
+++ b/cmd/mdmctl/remove_blueprints.go
@@ -10,7 +10,7 @@ import (
 func (cmd *removeCommand) removeBlueprints(args []string) error {
 	flagset := flag.NewFlagSet("remove-blueprints", flag.ExitOnError)
 	var (
-		flBlueprintName = flagset.String("name", "", "name of blueprint, optionally comma separated")
+		flBlueprintName = flagset.String("name", "", "name of blueprint, optionally comma-separated")
 	)
 	flagset.Usage = usageFor(flagset, "mdmctl remove blueprints [flags]")
 	if err := flagset.Parse(args); err != nil {
diff --git a/cmd/mdmctl/remove_devices.go b/cmd/mdmctl/remove_devices.go
index 8d03b5f4..f441d622 100644
--- a/cmd/mdmctl/remove_devices.go
+++ b/cmd/mdmctl/remove_devices.go
@@ -14,15 +14,15 @@ import (
 func (cmd *removeCommand) removeDevices(args []string) error {
 	flagset := flag.NewFlagSet("remove-devices", flag.ExitOnError)
 	var (
-		flIdentifier = flagset.String("udid", "", "device UDID, optionally comma separated")
-		flSerial     = flagset.String("serial", "", "device serial, optionally comma separated")
+		flIdentifier = flagset.String("udid", "", "device UDID, optionally comma-separated")
+		flSerials    = flagset.String("serials", "", "device serial, optionally comma-separated")
 	)
 	flagset.Usage = usageFor(flagset, "mdmctl remove devices [flags]")
 	if err := flagset.Parse(args); err != nil {
 		return err
 	}
 
-	if *flIdentifier == "" && *flSerial == "" {
+	if *flIdentifier == "" && *flSerials == "" {
 		flagset.Usage()
 		return errors.New("bad input: device UDID or Serial must be provided")
 	}
@@ -31,8 +31,8 @@ func (cmd *removeCommand) removeDevices(args []string) error {
 	if *flIdentifier != "" {
 		opts.UDIDs = strings.Split(*flIdentifier, ",")
 	}
-	if *flSerial != "" {
-		opts.Serials = strings.Split(*flSerial, ",")
+	if *flSerials != "" {
+		opts.Serials = strings.Split(*flSerials, ",")
 	}
 
 	ctx := context.Background()
diff --git a/cmd/mdmctl/remove_profiles.go b/cmd/mdmctl/remove_profiles.go
index 003b447e..164f42dc 100644
--- a/cmd/mdmctl/remove_profiles.go
+++ b/cmd/mdmctl/remove_profiles.go
@@ -10,7 +10,7 @@ import (
 func (cmd *removeCommand) removeProfiles(args []string) error {
 	flagset := flag.NewFlagSet("remove-profiles", flag.ExitOnError)
 	var (
-		flIdentifier = flagset.String("id", "", "profile Identifier, optionally comma separated")
+		flIdentifier = flagset.String("id", "", "profile identifier, optionally comma-separated")
 	)
 	flagset.Usage = usageFor(flagset, "mdmctl remove profiles [flags]")
 	if err := flagset.Parse(args); err != nil {