diff --git a/notifier/redis.go b/notifier/redis.go
index ef397a1..29d8627 100644
--- a/notifier/redis.go
+++ b/notifier/redis.go
@@ -211,7 +211,7 @@ func (db *DB) FinishDB() {
 
 // The first half of the transaction.  WATCH the key and fetch its value.
 // On error, UNWATCH the key.
-func (db *DB) watchAndGet(key string) (interface{}, error) {
+func (db *DB) watchAndGet(key string) (any, error) {
 	c, err := db.getPool()
 	if err != nil {
 		return nil, wrapErr(500, err)
@@ -246,7 +246,7 @@ func (db *DB) unwatch() {
 // WATCHed.  Encode payload by json and write it then commit,
 // or discard everything if any step fails.  On success, returns
 // what EXEC returns and nil.  On error, returns nil and *appError.
-func (db *DB) updateAndCommit(key string, payload interface{}) (interface{}, error) {
+func (db *DB) updateAndCommit(key string, payload any) (any, error) {
 	c, err := db.getPool()
 	if err != nil {
 		return nil, wrapErr(500, err)
@@ -294,13 +294,13 @@ func (db *DB) GetChannels(appname string) (map[string]*Channel, error) {
 		if err != nil {
 			return nil, wrapErr(500, err)
 		}
-		ar, ok := r.([]interface{})
+		ar, ok := r.([]any)
 		if !ok {
 			return nil, appErr(500, fmt.Sprintf("redis SCAN returned weird value: %v", r))
 		}
 
 		next := string(ar[0].([]byte))
-		keys, ok := ar[1].([]interface{})
+		keys, ok := ar[1].([]any)
 		if !ok {
 			return nil, appErr(500, fmt.Sprintf("redis SCAN returned weird value: %v", r))
 		}
diff --git a/notifier/redis_init_test.go b/notifier/redis_init_test.go
index 736e1e8..1c136ea 100644
--- a/notifier/redis_init_test.go
+++ b/notifier/redis_init_test.go
@@ -1,5 +1,4 @@
 //go:build redis_test
-// +build redis_test
 
 package notifier
 
diff --git a/notifier/redis_sentinel_init_test.go b/notifier/redis_sentinel_init_test.go
index 1965927..c5d9177 100644
--- a/notifier/redis_sentinel_init_test.go
+++ b/notifier/redis_sentinel_init_test.go
@@ -1,5 +1,4 @@
 //go:build redis_sentinel_test
-// +build redis_sentinel_test
 
 package notifier
 
diff --git a/notifier/redis_socket_test.go b/notifier/redis_socket_test.go
index 151ae20..3342b3b 100644
--- a/notifier/redis_socket_test.go
+++ b/notifier/redis_socket_test.go
@@ -1,5 +1,4 @@
 //go:build chrome_test && redis_test
-// +build chrome_test,redis_test
 
 package notifier
 
diff --git a/notifier/redis_test.go b/notifier/redis_test.go
index 43086c2..645bcae 100644
--- a/notifier/redis_test.go
+++ b/notifier/redis_test.go
@@ -1,5 +1,4 @@
 //go:build redis_test || redis_sentinel_test
-// +build redis_test redis_sentinel_test
 
 package notifier
 
diff --git a/notifier/socket.go b/notifier/socket.go
index 5012ebb..65d025a 100644
--- a/notifier/socket.go
+++ b/notifier/socket.go
@@ -29,7 +29,7 @@ type ConnectionEstablishedData struct {
 	ActivityTimeout int    `json:"activity_timeout"`
 }
 
-func encodePusherEvent(eventName string, chanName string, data interface{}) ([]byte, error) {
+func encodePusherEvent(eventName string, chanName string, data any) ([]byte, error) {
 	s, ok := data.(string)
 	if !ok {
 		js, err := json.Marshal(data)
@@ -62,7 +62,7 @@ func (s *Supervisor) socketFinish(u *User, logmsg string, err error) {
 	_ = u.Connection.Close()
 }
 
-func (s *Supervisor) socketSend(u *User, eventName string, chanName string, data interface{}) {
+func (s *Supervisor) socketSend(u *User, eventName string, chanName string, data any) {
 	msg, err := encodePusherEvent(eventName, chanName, data)
 	if err != nil {
 		s.socketFinish(u, "[internal] marshalling send packet error", err)
@@ -74,7 +74,7 @@ func (s *Supervisor) socketSend(u *User, eventName string, chanName string, data
 	}
 }
 
-func (s *Supervisor) socketSendInvalid(u *User, event string, received interface{}) {
+func (s *Supervisor) socketSendInvalid(u *User, event string, received any) {
 	s.logger.Debugw("invalid event",
 		"event", event,
 		"data", received)
@@ -115,8 +115,8 @@ func (s *Supervisor) socketMessageHandleLoop(u *User) {
 		s.logger.Infow("received", "message", string(p))
 
 		var ev struct {
-			Name string      `json:"event"`
-			Data interface{} `json:"data"`
+			Name string `json:"event"`
+			Data any    `json:"data"`
 		}
 		err = json.Unmarshal(p, &ev)
 		if err != nil {
@@ -128,7 +128,7 @@ func (s *Supervisor) socketMessageHandleLoop(u *User) {
 		case "pusher:ping":
 			s.socketSend(u, "pusher:pong", "", "ok")
 		case "pusher:subscribe":
-			m, ok := ev.Data.(map[string]interface{})
+			m, ok := ev.Data.(map[string]any)
 			if !ok {
 				s.socketSendInvalid(u, ev.Name, ev.Data)
 				break
@@ -155,7 +155,7 @@ func (s *Supervisor) socketMessageHandleLoop(u *User) {
 			}
 			s.socketSend(u, "pusher_internal:subscription_succeeded", channel.(string), "ok")
 		case "pusher:unsubscribe":
-			m, ok := ev.Data.(map[string]interface{})
+			m, ok := ev.Data.(map[string]any)
 			if !ok {
 				s.socketSendInvalid(u, ev.Name, ev.Data)
 				break
diff --git a/notifier/socket_test.go b/notifier/socket_test.go
index 68b2acc..6262ba5 100644
--- a/notifier/socket_test.go
+++ b/notifier/socket_test.go
@@ -1,5 +1,4 @@
 //go:build chrome_test
-// +build chrome_test
 
 package notifier
 
diff --git a/notifier/view.go b/notifier/view.go
index 21cf240..3bb9955 100644
--- a/notifier/view.go
+++ b/notifier/view.go
@@ -53,7 +53,7 @@ type getChannelResponse struct {
 	SubscriptionCount int  `json:"subscription_count,omitempty"`
 }
 
-func returnJSON(w http.ResponseWriter, val interface{}) {
+func returnJSON(w http.ResponseWriter, val any) {
 	js, err := json.Marshal(val)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)