diff --git a/src/c3card_gateway_command.erl b/src/c3card_gateway_command.erl
index ffb6442..c2b70f2 100644
--- a/src/c3card_gateway_command.erl
+++ b/src/c3card_gateway_command.erl
@@ -36,9 +36,9 @@ handle_command({candy, Turn}) ->
     noreply;
 handle_command(ping) ->
     spawn(fun() ->
-		  c3card_neopixel:toggle_led(1, 120),
-		  c3card_neopixel:clear_all()
-	  end),
+                  c3card_neopixel:toggle_led(1, 120),
+                  c3card_neopixel:clear_all()
+          end),
     {reply, pong};
 handle_command(Command) ->
     io:format("unknown command from gateway: ~p~n", [Command]),
diff --git a/src/c3card_wifi.erl b/src/c3card_wifi.erl
index e75e79f..21f0d14 100644
--- a/src/c3card_wifi.erl
+++ b/src/c3card_wifi.erl
@@ -40,17 +40,17 @@ start(Config) ->
                  {synchronized, fun ntp_syncronized/1}]},
          {sta, [{connected, fun connected/0},
                 {got_ip, fun(IpInfo) ->
-				 got_ip(IpInfo),
-				 Parent ! {ip, IpInfo}
-			 end},
+                                 got_ip(IpInfo),
+                                 Parent ! {ip, IpInfo}
+                         end},
                 {disconnected, fun disconnected/0},
                 {ssid, SSID},
                 {psk, Psk}]}],
     case network:start(NetConfig) of
         {ok, _Pid} ->
-	    receive
-		{ip, IpInfo} -> {ok, IpInfo}
-	    end;
+            receive
+                {ip, IpInfo} -> {ok, IpInfo}
+            end;
         Error ->
             ?LOG_ERROR("an error happened: ~p", [Error]),
             Error