diff --git a/lib/lita/adapters/tox.rb b/lib/lita/adapters/tox.rb
index 1b3f998..deffaeb 100644
--- a/lib/lita/adapters/tox.rb
+++ b/lib/lita/adapters/tox.rb
@@ -41,6 +41,20 @@ module Lita
           message.command!
           robot.receive(message)
         end
+
+        @tox.on_group_invite do |friend_number, data|
+          @tox.join_groupchat(friend_number, data)
+        end
+
+        @tox.on_group_message do |group_number, peer_number, text|
+          unless @tox.group_peernumber_is_ours(group_number, peer_number)
+            user = User.new(-1 - peer_number) # TODO
+            source = Source.new(user: user, room: group_number)
+            message = Message.new(robot, text, source)
+
+            robot.receive(message)
+          end
+        end
       end
 
       def run
@@ -59,7 +73,11 @@ module Lita
 
       def send_messages(target, messages)
         messages.reject(&:empty?).each do |message|
-          @tox.friend_send_message(target.user.id.to_i, message)
+          if target.user.id.to_i >= 0
+            @tox.friend_send_message(target.user.id.to_i, message)
+          else
+            @tox.group_message_send(target.room.to_i, message)
+          end
         end
       end
     end