diff --git a/telegram/commands.go b/telegram/commands.go
index 74406f5..b26a971 100644
--- a/telegram/commands.go
+++ b/telegram/commands.go
@@ -423,6 +423,26 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 				return err.Error(), true
 			}
 		}
+	// blacklists current user
+	case "block":
+		if chatID > 0 {
+			_, err := c.client.BlockUser(&client.BlockUserRequest{
+				UserId: int32(chatID),
+			})
+			if err != nil {
+				return err.Error(), true
+			}
+		}
+	// unblacklists current user
+	case "unblock":
+		if chatID > 0 {
+			_, err := c.client.UnblockUser(&client.UnblockUserRequest{
+				UserId: int32(chatID),
+			})
+			if err != nil {
+				return err.Error(), true
+			}
+		}
 	case "help":
 		return helpString(helpTypeChat), true
 	default: