diff --git a/VERSION b/VERSION
index b74e5a1cc80..359ee08a7ce 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.86.7
+0.87.0
diff --git a/protocol/message_persistence.go b/protocol/message_persistence.go
index 4022d63dc1b..d73723355e0 100644
--- a/protocol/message_persistence.go
+++ b/protocol/message_persistence.go
@@ -752,6 +752,28 @@ func (db sqlitePersistence) AllMessagesFromChatsAndCommunitiesWhichMatchTerm(com
 	return result, nil
 }
 
+func (db sqlitePersistence) AllChatIDsByCommunity(communityID string) ([]string, error) {
+	rows, err := db.db.Query("SELECT id FROM chats WHERE community_id = ?", communityID)
+
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var rst []string
+
+	for rows.Next() {
+		var chatID string
+		err = rows.Scan(&chatID)
+		if err != nil {
+			return nil, err
+		}
+		rst = append(rst, chatID)
+	}
+
+	return rst, nil
+}
+
 // PinnedMessageByChatID returns all pinned messages for a given chatID in descending order.
 // Ordering is accomplished using two concatenated values: ClockValue and ID.
 // These two values are also used to compose a cursor which is returned to the result.
@@ -1254,6 +1276,40 @@ func (db sqlitePersistence) MarkAllRead(chatID string) error {
 	return err
 }
 
+func (db sqlitePersistence) MarkAllReadMultiple(chatIDs []string) error {
+	tx, err := db.db.BeginTx(context.Background(), &sql.TxOptions{})
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err == nil {
+			err = tx.Commit()
+			return
+		}
+		// don't shadow original error
+		_ = tx.Rollback()
+	}()
+
+	idsArgs := make([]interface{}, 0, len(chatIDs))
+	for _, id := range chatIDs {
+		idsArgs = append(idsArgs, id)
+	}
+
+	inVector := strings.Repeat("?, ", len(chatIDs)-1) + "?"
+
+	q := "UPDATE user_messages SET seen = 1 WHERE local_chat_id IN (%s) AND seen != 1"
+	q = fmt.Sprintf(q, inVector)
+	_, err = tx.Exec(q, idsArgs...)
+	if err != nil {
+		return err
+	}
+
+	q = "UPDATE chats SET unviewed_mentions_count = 0, unviewed_message_count = 0 WHERE id IN (%s)"
+	q = fmt.Sprintf(q, inVector)
+	_, err = tx.Exec(q, idsArgs...)
+	return err
+}
+
 func (db sqlitePersistence) MarkMessagesSeen(chatID string, ids []string) (uint64, uint64, error) {
 	tx, err := db.db.BeginTx(context.Background(), &sql.TxOptions{})
 	if err != nil {
diff --git a/protocol/messenger.go b/protocol/messenger.go
index babb56c3895..57ceaf768c7 100644
--- a/protocol/messenger.go
+++ b/protocol/messenger.go
@@ -3294,6 +3294,32 @@ func (m *Messenger) MarkAllRead(chatID string) error {
 	return nil
 }
 
+func (m *Messenger) MarkAllReadInCommunity(communityID string) ([]string, error) {
+	chatIDs, err := m.persistence.AllChatIDsByCommunity(communityID)
+	if err != nil {
+		return nil, err
+	}
+
+	err = m.persistence.MarkAllReadMultiple(chatIDs)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, chatID := range chatIDs {
+		chat, ok := m.allChats.Load(chatID)
+
+		if ok {
+			chat.UnviewedMessagesCount = 0
+			chat.UnviewedMentionsCount = 0
+			m.allChats.Store(chat.ID, chat)
+		} else {
+			err = errors.New(fmt.Sprintf("chat with chatID %s not found", chatID))
+		}
+	}
+
+	return chatIDs, err
+}
+
 // MuteChat signals to the messenger that we don't want to be notified
 // on new messages from this chat
 func (m *Messenger) MuteChat(chatID string) error {
diff --git a/services/ext/api.go b/services/ext/api.go
index 32f03b9d82f..b7ae2820cd3 100644
--- a/services/ext/api.go
+++ b/services/ext/api.go
@@ -575,6 +575,10 @@ func (api *PublicAPI) MarkAllRead(chatID string) error {
 	return api.service.messenger.MarkAllRead(chatID)
 }
 
+func (api *PublicAPI) MarkAllReadInCommunity(communityID string) ([]string, error) {
+	return api.service.messenger.MarkAllReadInCommunity(communityID)
+}
+
 func (api *PublicAPI) AddContact(ctx context.Context, pubKey string) (*protocol.MessengerResponse, error) {
 	return api.service.messenger.AddContact(ctx, pubKey)
 }