diff --git a/telegram/commands.go b/telegram/commands.go
index 2847ceb..7f97a6c 100644
--- a/telegram/commands.go
+++ b/telegram/commands.go
@@ -75,6 +75,7 @@ var chatCommands = map[string]command{
 	"promote":    command{"id or @username [title]", "promote user to admin in current chat"},
 	"leave":      command{"", "leave current chat"},
 	"leave!":     command{"", "leave current chat (for owners)"},
+	"ttl":        command{"", "set secret chat messages TTL before self-destroying (in seconds)"},
 	"close":      command{"", "close current secret chat"},
 	"delete":     command{"", "delete current chat from chat list"},
 	"members":    command{"[query]", "search members [by optional query] in current chat (requires admin rights)"},
@@ -739,6 +740,24 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		}
 
 		err = c.unsubscribe(chatID)
+		if err != nil {
+			return err.Error(), true
+		}
+	// set TTL
+	case "ttl":
+		var ttl int64
+		var err error
+		if len(args) > 0 {
+			ttl, err = strconv.ParseInt(args[0], 10, 32)
+			if err != nil {
+				return "Invalid TTL", true
+			}
+		}
+		_, err = c.client.SetChatMessageTtl(&client.SetChatMessageTtlRequest{
+			ChatId: chatID,
+			Ttl:    int32(ttl),
+		})
+
 		if err != nil {
 			return err.Error(), true
 		}