diff --git a/vendor/github.com/nlopes/slack/.travis.yml b/vendor/github.com/nlopes/slack/.travis.yml
index ed99d9e..6a96823 100644
--- a/vendor/github.com/nlopes/slack/.travis.yml
+++ b/vendor/github.com/nlopes/slack/.travis.yml
@@ -28,6 +28,10 @@ matrix:
     script:  go test -v ./...
   - go: "1.11.x"
     script: go test -v -mod=vendor ./...
+  - go: "1.12.x"
+    script: go test -v -mod=vendor ./...
+  - go: "1.13.x"
+    script: go test -v -mod=vendor ./...
   - go: "tip"
     script: go test -v -mod=vendor ./...
 
diff --git a/vendor/github.com/nlopes/slack/attachments.go b/vendor/github.com/nlopes/slack/attachments.go
index cf8b5c6..73cdebe 100644
--- a/vendor/github.com/nlopes/slack/attachments.go
+++ b/vendor/github.com/nlopes/slack/attachments.go
@@ -61,7 +61,7 @@ type ConfirmationField struct {
 // Attachment contains all the information for an attachment
 type Attachment struct {
 	Color    string `json:"color,omitempty"`
-	Fallback string `json:"fallback"`
+	Fallback string `json:"fallback,omitempty"`
 
 	CallbackID string `json:"callback_id,omitempty"`
 	ID         int    `json:"id,omitempty"`
@@ -75,7 +75,7 @@ type Attachment struct {
 	Title     string `json:"title,omitempty"`
 	TitleLink string `json:"title_link,omitempty"`
 	Pretext   string `json:"pretext,omitempty"`
-	Text      string `json:"text"`
+	Text      string `json:"text,omitempty"`
 
 	ImageURL string `json:"image_url,omitempty"`
 	ThumbURL string `json:"thumb_url,omitempty"`
@@ -84,6 +84,8 @@ type Attachment struct {
 	Actions    []AttachmentAction `json:"actions,omitempty"`
 	MarkdownIn []string           `json:"mrkdwn_in,omitempty"`
 
+	Blocks []Block `json:"blocks,omitempty"`
+
 	Footer     string `json:"footer,omitempty"`
 	FooterIcon string `json:"footer_icon,omitempty"`
 
diff --git a/vendor/github.com/nlopes/slack/block.go b/vendor/github.com/nlopes/slack/block.go
index 1fc7fec..502b113 100644
--- a/vendor/github.com/nlopes/slack/block.go
+++ b/vendor/github.com/nlopes/slack/block.go
@@ -30,22 +30,23 @@ type Blocks struct {
 
 // BlockAction is the action callback sent when a block is interacted with
 type BlockAction struct {
-	ActionID             string            `json:"action_id"`
-	BlockID              string            `json:"block_id"`
-	Type                 actionType        `json:"type"`
-	Text                 TextBlockObject   `json:"text"`
-	Value                string            `json:"value"`
-	ActionTs             string            `json:"action_ts"`
-	SelectedOption       OptionBlockObject `json:"selected_option"`
-	SelectedUser         string            `json:"selected_user"`
-	SelectedChannel      string            `json:"selected_channel"`
-	SelectedConversation string            `json:"selected_conversation"`
-	SelectedDate         string            `json:"selected_date"`
-	InitialOption        OptionBlockObject `json:"initial_option"`
-	InitialUser          string            `json:"initial_user"`
-	InitialChannel       string            `json:"initial_channel"`
-	InitialConversation  string            `json:"initial_conversation"`
-	InitialDate          string            `json:"initial_date"`
+	ActionID             string              `json:"action_id"`
+	BlockID              string              `json:"block_id"`
+	Type                 actionType          `json:"type"`
+	Text                 TextBlockObject     `json:"text"`
+	Value                string              `json:"value"`
+	ActionTs             string              `json:"action_ts"`
+	SelectedOption       OptionBlockObject   `json:"selected_option"`
+	SelectedOptions      []OptionBlockObject `json:"selected_options"`
+	SelectedUser         string              `json:"selected_user"`
+	SelectedChannel      string              `json:"selected_channel"`
+	SelectedConversation string              `json:"selected_conversation"`
+	SelectedDate         string              `json:"selected_date"`
+	InitialOption        OptionBlockObject   `json:"initial_option"`
+	InitialUser          string              `json:"initial_user"`
+	InitialChannel       string              `json:"initial_channel"`
+	InitialConversation  string              `json:"initial_conversation"`
+	InitialDate          string              `json:"initial_date"`
 }
 
 // actionType returns the type of the action
diff --git a/vendor/github.com/nlopes/slack/block_conv.go b/vendor/github.com/nlopes/slack/block_conv.go
index 619867e..bdc490e 100644
--- a/vendor/github.com/nlopes/slack/block_conv.go
+++ b/vendor/github.com/nlopes/slack/block_conv.go
@@ -60,6 +60,9 @@ func (b *Blocks) UnmarshalJSON(data []byte) error {
 			block = &ImageBlock{}
 		case "section":
 			block = &SectionBlock{}
+		case "rich_text":
+			// for now ignore the (complex) content of rich_text blocks until we can fully support it
+			continue
 		default:
 			return errors.New("unsupported block type")
 		}
diff --git a/vendor/github.com/nlopes/slack/block_object.go b/vendor/github.com/nlopes/slack/block_object.go
index 9e77e6c..824ec93 100644
--- a/vendor/github.com/nlopes/slack/block_object.go
+++ b/vendor/github.com/nlopes/slack/block_object.go
@@ -178,7 +178,7 @@ func NewConfirmationBlockObject(title, text, confirm, deny *TextBlockObject) *Co
 type OptionBlockObject struct {
 	Text  *TextBlockObject `json:"text"`
 	Value string           `json:"value"`
-	URL   string           `json:"url"`
+	URL   string           `json:"url,omitempty"`
 }
 
 // NewOptionBlockObject returns an instance of a new Option Block Element
diff --git a/vendor/github.com/nlopes/slack/bots.go b/vendor/github.com/nlopes/slack/bots.go
index 5d5a2ad..da21ba0 100644
--- a/vendor/github.com/nlopes/slack/bots.go
+++ b/vendor/github.com/nlopes/slack/bots.go
@@ -7,10 +7,13 @@ import (
 
 // Bot contains information about a bot
 type Bot struct {
-	ID      string `json:"id"`
-	Name    string `json:"name"`
-	Deleted bool   `json:"deleted"`
-	Icons   Icons  `json:"icons"`
+	ID      string   `json:"id"`
+	Name    string   `json:"name"`
+	Deleted bool     `json:"deleted"`
+	UserID  string   `json:"user_id"`
+	AppID   string   `json:"app_id"`
+	Updated JSONTime `json:"updated"`
+	Icons   Icons    `json:"icons"`
 }
 
 type botResponseFull struct {
diff --git a/vendor/github.com/nlopes/slack/chat.go b/vendor/github.com/nlopes/slack/chat.go
index a480e5a..c074484 100644
--- a/vendor/github.com/nlopes/slack/chat.go
+++ b/vendor/github.com/nlopes/slack/chat.go
@@ -228,6 +228,7 @@ type sendConfig struct {
 	endpoint     string
 	values       url.Values
 	attachments  []Attachment
+	blocks       Blocks
 	responseType string
 }
 
@@ -242,6 +243,7 @@ func (t sendConfig) BuildRequest(token, channelID string) (req *http.Request, _
 			endpoint:     t.endpoint,
 			values:       t.values,
 			attachments:  t.attachments,
+			blocks:       t.blocks,
 			responseType: t.responseType,
 		}.BuildRequest()
 	default:
@@ -265,6 +267,7 @@ type responseURLSender struct {
 	endpoint     string
 	values       url.Values
 	attachments  []Attachment
+	blocks       Blocks
 	responseType string
 }
 
@@ -273,6 +276,7 @@ func (t responseURLSender) BuildRequest() (*http.Request, func(*chatResponseFull
 		Text:         t.values.Get("text"),
 		Timestamp:    t.values.Get("ts"),
 		Attachments:  t.attachments,
+		Blocks:       t.blocks,
 		ResponseType: t.responseType,
 	})
 	return req, func(resp *chatResponseFull) responseParser {
@@ -420,6 +424,8 @@ func MsgOptionBlocks(blocks ...Block) MsgOption {
 			return nil
 		}
 
+		config.blocks.BlockSet = append(config.blocks.BlockSet, blocks...)
+
 		blocks, err := json.Marshal(blocks)
 		if err == nil {
 			config.values.Set("blocks", string(blocks))
diff --git a/vendor/github.com/nlopes/slack/errors.go b/vendor/github.com/nlopes/slack/errors.go
index 09113ff..b31e2ca 100644
--- a/vendor/github.com/nlopes/slack/errors.go
+++ b/vendor/github.com/nlopes/slack/errors.go
@@ -6,6 +6,8 @@ import "github.com/nlopes/slack/internal/errorsx"
 const (
 	ErrAlreadyDisconnected  = errorsx.String("Invalid call to Disconnect - Slack API is already disconnected")
 	ErrRTMDisconnected      = errorsx.String("disconnect received while trying to connect")
+	ErrRTMGoodbye           = errorsx.String("goodbye detected")
+	ErrRTMDeadman           = errorsx.String("deadman switch triggered")
 	ErrParametersMissing    = errorsx.String("received empty parameters")
 	ErrInvalidConfiguration = errorsx.String("invalid configuration")
 	ErrMissingHeaders       = errorsx.String("missing headers")
diff --git a/vendor/github.com/nlopes/slack/interactions.go b/vendor/github.com/nlopes/slack/interactions.go
index 5433463..de1ed37 100644
--- a/vendor/github.com/nlopes/slack/interactions.go
+++ b/vendor/github.com/nlopes/slack/interactions.go
@@ -1,6 +1,7 @@
 package slack
 
 import (
+	"bytes"
 	"encoding/json"
 )
 
@@ -53,6 +54,48 @@ type ActionCallbacks struct {
 	BlockActions      []*BlockAction
 }
 
+// MarshalJSON implements the Marshaller interface in order to combine both
+// action callback types back into a single array, like how the api responds.
+// This makes Marshaling and Unmarshaling an InteractionCallback symmetrical
+func (a ActionCallbacks) MarshalJSON() ([]byte, error) {
+	count := 0
+	length := len(a.AttachmentActions) + len(a.BlockActions)
+	buffer := bytes.NewBufferString("[")
+
+	f := func(obj interface{}) error {
+		js, err := json.Marshal(obj)
+		if err != nil {
+			return err
+		}
+		_, err = buffer.Write(js)
+		if err != nil {
+			return err
+		}
+
+		count++
+		if count < length {
+			_, err = buffer.WriteString(",")
+			return err
+		}
+		return nil
+	}
+
+	for _, act := range a.AttachmentActions {
+		err := f(act)
+		if err != nil {
+			return nil, err
+		}
+	}
+	for _, blk := range a.BlockActions {
+		err := f(blk)
+		if err != nil {
+			return nil, err
+		}
+	}
+	buffer.WriteString("]")
+	return buffer.Bytes(), nil
+}
+
 // UnmarshalJSON implements the Marshaller interface in order to delegate
 // marshalling and allow for proper type assertion when decoding the response
 func (a *ActionCallbacks) UnmarshalJSON(data []byte) error {
diff --git a/vendor/github.com/nlopes/slack/messages.go b/vendor/github.com/nlopes/slack/messages.go
index 37a2633..f67d99a 100644
--- a/vendor/github.com/nlopes/slack/messages.go
+++ b/vendor/github.com/nlopes/slack/messages.go
@@ -101,7 +101,7 @@ type Msg struct {
 const (
 	// ResponseTypeInChannel in channel response for slash commands.
 	ResponseTypeInChannel = "in_channel"
-	// ResponseTypeEphemeral ephemeral respone for slash commands.
+	// ResponseTypeEphemeral ephemeral response for slash commands.
 	ResponseTypeEphemeral = "ephemeral"
 )
 
diff --git a/vendor/github.com/nlopes/slack/rtm.go b/vendor/github.com/nlopes/slack/rtm.go
index 09cb51c..ef6ba34 100644
--- a/vendor/github.com/nlopes/slack/rtm.go
+++ b/vendor/github.com/nlopes/slack/rtm.go
@@ -2,7 +2,6 @@ package slack
 
 import (
 	"context"
-	"encoding/json"
 	"net/url"
 	"sync"
 	"time"
@@ -120,7 +119,6 @@ func (api *Client) NewRTM(options ...RTMOption) *RTM {
 		disconnected:     make(chan struct{}),
 		disconnectedm:    &sync.Once{},
 		forcePing:        make(chan bool),
-		rawEvents:        make(chan json.RawMessage),
 		idGen:            NewSafeID(1),
 		mu:               &sync.Mutex{},
 	}
diff --git a/vendor/github.com/nlopes/slack/search.go b/vendor/github.com/nlopes/slack/search.go
index 67e3b1d..de6b40a 100644
--- a/vendor/github.com/nlopes/slack/search.go
+++ b/vendor/github.com/nlopes/slack/search.go
@@ -23,8 +23,14 @@ type SearchParameters struct {
 }
 
 type CtxChannel struct {
-	ID   string `json:"id"`
-	Name string `json:"name"`
+	ID                 string `json:"id"`
+	Name               string `json:"name"`
+	IsExtShared        bool   `json:"is_ext_shared"`
+	IsMPIM             bool   `json:"is_mpim"`
+	ISOrgShared        bool   `json:"is_org_shared"`
+	IsPendingExtShared bool   `json:"is_pending_ext_shared"`
+	IsPrivate          bool   `json:"is_private"`
+	IsShared           bool   `json:"is_shared"`
 }
 
 type CtxMessage struct {
diff --git a/vendor/github.com/nlopes/slack/stars.go b/vendor/github.com/nlopes/slack/stars.go
index e84d044..5296760 100644
--- a/vendor/github.com/nlopes/slack/stars.go
+++ b/vendor/github.com/nlopes/slack/stars.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"net/url"
 	"strconv"
+	"time"
 )
 
 const (
@@ -158,3 +159,105 @@ func (api *Client) GetStarredContext(ctx context.Context, params StarsParameters
 	}
 	return starredItems, paging, nil
 }
+
+type listResponsePaginated struct {
+	Items []Item `json:"items"`
+	SlackResponse
+	Metadata ResponseMetadata `json:"response_metadata"`
+}
+
+// StarredItemPagination allows for paginating over the starred items
+type StarredItemPagination struct {
+	Items        []Item
+	limit        int
+	previousResp *ResponseMetadata
+	c            *Client
+}
+
+// ListStarsOption options for the GetUsers method call.
+type ListStarsOption func(*StarredItemPagination)
+
+// ListAllStars returns the complete list of starred items
+func (api *Client) ListAllStars() ([]Item, error) {
+	return api.ListAllStarsContext(context.Background())
+}
+
+// ListAllStarsContext returns the list of users (with their detailed information) with a custom context
+func (api *Client) ListAllStarsContext(ctx context.Context) (results []Item, err error) {
+	p := api.ListStarsPaginated()
+	for err == nil {
+		p, err = p.next(ctx)
+		if err == nil {
+			results = append(results, p.Items...)
+		} else if rateLimitedError, ok := err.(*RateLimitedError); ok {
+			select {
+			case <-ctx.Done():
+				err = ctx.Err()
+			case <-time.After(rateLimitedError.RetryAfter):
+				err = nil
+			}
+		}
+	}
+
+	return results, p.failure(err)
+}
+
+// ListStarsPaginated fetches users in a paginated fashion, see ListStarsPaginationContext for usage.
+func (api *Client) ListStarsPaginated(options ...ListStarsOption) StarredItemPagination {
+	return newStarPagination(api, options...)
+}
+
+func newStarPagination(c *Client, options ...ListStarsOption) (sip StarredItemPagination) {
+	sip = StarredItemPagination{
+		c:     c,
+		limit: 200, // per slack api documentation.
+	}
+
+	for _, opt := range options {
+		opt(&sip)
+	}
+
+	return sip
+}
+
+// done checks if the pagination has completed
+func (StarredItemPagination) done(err error) bool {
+	return err == errPaginationComplete
+}
+
+// done checks if pagination failed.
+func (t StarredItemPagination) failure(err error) error {
+	if t.done(err) {
+		return nil
+	}
+
+	return err
+}
+
+// next gets the next list of starred items based on the cursor value
+func (t StarredItemPagination) next(ctx context.Context) (_ StarredItemPagination, err error) {
+	var (
+		resp *listResponsePaginated
+	)
+
+	if t.c == nil || (t.previousResp != nil && t.previousResp.Cursor == "") {
+		return t, errPaginationComplete
+	}
+
+	t.previousResp = t.previousResp.initialize()
+
+	values := url.Values{
+		"limit":  {strconv.Itoa(t.limit)},
+		"token":  {t.c.token},
+		"cursor": {t.previousResp.Cursor},
+	}
+
+	if err = t.c.postMethod(ctx, "stars.list", values, &resp); err != nil {
+		return t, err
+	}
+
+	t.previousResp = &resp.Metadata
+	t.Items = resp.Items
+
+	return t, nil
+}
diff --git a/vendor/github.com/nlopes/slack/websocket.go b/vendor/github.com/nlopes/slack/websocket.go
index 122807b..d6895f2 100644
--- a/vendor/github.com/nlopes/slack/websocket.go
+++ b/vendor/github.com/nlopes/slack/websocket.go
@@ -1,7 +1,6 @@
 package slack
 
 import (
-	"encoding/json"
 	"net/url"
 	"sync"
 	"time"
@@ -35,7 +34,6 @@ type RTM struct {
 	disconnected     chan struct{}
 	disconnectedm    *sync.Once
 	forcePing        chan bool
-	rawEvents        chan json.RawMessage
 
 	// UserDetails upon connection
 	info *Info
diff --git a/vendor/github.com/nlopes/slack/websocket_desktop_notification.go b/vendor/github.com/nlopes/slack/websocket_desktop_notification.go
new file mode 100644
index 0000000..7c61abf
--- /dev/null
+++ b/vendor/github.com/nlopes/slack/websocket_desktop_notification.go
@@ -0,0 +1,19 @@
+package slack
+
+// DesktopNotificationEvent represents the update event for Desktop Notification.
+type DesktopNotificationEvent struct {
+	Type            string `json:"type"`
+	Title           string `json:"title"`
+	Subtitle        string `json:"subtitle"`
+	Message         string `json:"msg"`
+	Timestamp       string `json:"ts"`
+	Content         string `json:"content"`
+	Channel         string `json:"channel"`
+	LaunchURI       string `json:"launchUri"`
+	AvatarImage     string `json:"avatarImage"`
+	SsbFilename     string `json:"ssbFilename"`
+	ImageURI        string `json:"imageUri"`
+	IsShared        bool   `json:"is_shared"`
+	IsChannelInvite bool   `json:"is_channel_invite"`
+	EventTimestamp  string `json:"event_ts"`
+}
diff --git a/vendor/github.com/nlopes/slack/websocket_managed_conn.go b/vendor/github.com/nlopes/slack/websocket_managed_conn.go
index 8b3b383..dbbf682 100644
--- a/vendor/github.com/nlopes/slack/websocket_managed_conn.go
+++ b/vendor/github.com/nlopes/slack/websocket_managed_conn.go
@@ -58,15 +58,19 @@ func (rtm *RTM) ManageConnection() {
 
 		rtm.Debugf("RTM connection succeeded on try %d", connectionCount)
 
+		rawEvents := make(chan json.RawMessage)
 		// we're now connected so we can set up listeners
-		go rtm.handleIncomingEvents()
-
+		go rtm.handleIncomingEvents(rawEvents)
 		// this should be a blocking call until the connection has ended
-		rtm.handleEvents()
+		rtm.handleEvents(rawEvents)
 
 		select {
 		case <-rtm.disconnected:
 			// after handle events returns we need to check if we're disconnected
+			// when this happens we need to cleanup the newly created connection.
+			if err = conn.Close(); err != nil {
+				rtm.Debugln("failed to close conn on disconnected RTM", err)
+			}
 			return
 		default:
 			// otherwise continue and run the loop again to reconnect
@@ -208,7 +212,7 @@ func (rtm *RTM) startRTMAndDial(useRTMStart bool) (info *Info, _ *websocket.Conn
 // This should not be called directly! Instead a boolean value (true for
 // intentional, false otherwise) should be sent to the killChannel on the RTM.
 func (rtm *RTM) killConnection(intentional bool, cause error) (err error) {
-	rtm.Debugln("killing connection")
+	rtm.Debugln("killing connection", cause)
 
 	if rtm.conn != nil {
 		err = rtm.conn.Close()
@@ -228,7 +232,7 @@ func (rtm *RTM) killConnection(intentional bool, cause error) (err error) {
 // interval. This also sends outgoing messages that are received from the RTM's
 // outgoingMessages channel. This also handles incoming raw events from the RTM
 // rawEvents channel.
-func (rtm *RTM) handleEvents() {
+func (rtm *RTM) handleEvents(events chan json.RawMessage) {
 	ticker := time.NewTicker(rtm.pingInterval)
 	defer ticker.Stop()
 	for {
@@ -239,7 +243,7 @@ func (rtm *RTM) handleEvents() {
 			return
 		// detect when the connection is dead.
 		case <-rtm.pingDeadman.C:
-			_ = rtm.killConnection(false, errorsx.String("deadman switch triggered"))
+			_ = rtm.killConnection(false, ErrRTMDeadman)
 			return
 		// send pings on ticker interval
 		case <-ticker.C:
@@ -255,12 +259,17 @@ func (rtm *RTM) handleEvents() {
 		// listen for messages that need to be sent
 		case msg := <-rtm.outgoingMessages:
 			rtm.sendOutgoingMessage(msg)
-		// listen for incoming messages that need to be parsed
-		case rawEvent := <-rtm.rawEvents:
+			// listen for incoming messages that need to be parsed
+		case rawEvent := <-events:
 			switch rtm.handleRawEvent(rawEvent) {
 			case rtmEventTypeGoodbye:
-				_ = rtm.killConnection(false, errorsx.String("goodbye detected"))
-				return
+				// kill the connection, but DO NOT RETURN, a follow up kill signal will
+				// be sent that still needs to be processed. this duplication is because
+				// the event reader restarts once it emits the goodbye event.
+				// unlike the other cases in this function a final read will be triggered
+				// against the connection which will emit a kill signal. if we return early
+				// this kill signal will be processed by the next connection.
+				_ = rtm.killConnection(false, ErrRTMGoodbye)
 			default:
 			}
 		}
@@ -268,13 +277,17 @@ func (rtm *RTM) handleEvents() {
 }
 
 // handleIncomingEvents monitors the RTM's opened websocket for any incoming
-// events. It pushes the raw events onto the RTM channel rawEvents.
+// events. It pushes the raw events into the channel.
 //
-// This will stop executing once the RTM's keepRunning channel has been closed
-// or has anything sent to it.
-func (rtm *RTM) handleIncomingEvents() {
+// This will stop executing once the RTM's when a fatal error is detected, or
+// a disconnect occurs.
+func (rtm *RTM) handleIncomingEvents(events chan json.RawMessage) {
 	for {
-		if err := rtm.receiveIncomingEvent(); err != nil {
+		if err := rtm.receiveIncomingEvent(events); err != nil {
+			select {
+			case rtm.killChannel <- false:
+			case <-rtm.disconnected:
+			}
 			return
 		}
 	}
@@ -336,9 +349,15 @@ func (rtm *RTM) ping() error {
 // receiveIncomingEvent attempts to receive an event from the RTM's websocket.
 // This will block until a frame is available from the websocket.
 // If the read from the websocket results in a fatal error, this function will return non-nil.
-func (rtm *RTM) receiveIncomingEvent() error {
+func (rtm *RTM) receiveIncomingEvent(events chan json.RawMessage) error {
 	event := json.RawMessage{}
 	err := rtm.conn.ReadJSON(&event)
+
+	// check if the connection was closed.
+	if websocket.IsUnexpectedCloseError(err) {
+		return err
+	}
+
 	switch {
 	case err == io.ErrUnexpectedEOF:
 		// EOF's don't seem to signify a failed connection so instead we ignore
@@ -357,22 +376,18 @@ func (rtm *RTM) receiveIncomingEvent() error {
 			ErrorObj: err,
 		}}
 
-		select {
-		case rtm.killChannel <- false:
-		case <-rtm.disconnected:
-		}
-
 		return err
 	case len(event) == 0:
 		rtm.Debugln("Received empty event")
 	default:
 		rtm.Debugln("Incoming Event:", string(event))
 		select {
-		case rtm.rawEvents <- event:
+		case events <- event:
 		case <-rtm.disconnected:
 			rtm.Debugln("disonnected while attempting to send raw event")
 		}
 	}
+
 	return nil
 }
 
@@ -396,8 +411,6 @@ func (rtm *RTM) handleRawEvent(rawEvent json.RawMessage) string {
 		rtm.handlePong(rawEvent)
 	case rtmEventTypeGoodbye:
 		// just return the event type up for goodbye, will be handled by caller.
-	case rtmEventTypeDesktopNotification:
-		rtm.Debugln("Received desktop notification, ignoring")
 	default:
 		rtm.handleEvent(event.Type, rawEvent)
 	}
@@ -563,4 +576,6 @@ var EventMapping = map[string]interface{}{
 	"subteam_self_added":   SubteamSelfAddedEvent{},
 	"subteam_self_removed": SubteamSelfRemovedEvent{},
 	"subteam_updated":      SubteamUpdatedEvent{},
+
+	"desktop_notification": DesktopNotificationEvent{},
 }
diff --git a/vendor/github.com/nlopes/slack/websocket_misc.go b/vendor/github.com/nlopes/slack/websocket_misc.go
index bfcc805..65a8bb6 100644
--- a/vendor/github.com/nlopes/slack/websocket_misc.go
+++ b/vendor/github.com/nlopes/slack/websocket_misc.go
@@ -131,7 +131,7 @@ type MemberJoinedChannelEvent struct {
 	Inviter     string `json:"inviter"`
 }
 
-// MemberJoinedChannelEvent, a user left a public or private channel
+// MemberLeftChannelEvent a user left a public or private channel
 type MemberLeftChannelEvent struct {
 	Type        string `json:"type"`
 	User        string `json:"user"`