diff --git a/fhem/FHEM/74_THINKINGCLEANER.pm b/fhem/FHEM/74_THINKINGCLEANER.pm
index e9827f0ce..fe48fa97b 100644
--- a/fhem/FHEM/74_THINKINGCLEANER.pm
+++ b/fhem/FHEM/74_THINKINGCLEANER.pm
@@ -1102,6 +1102,7 @@ sub THINKINGCLEANER_SendCommand($$;$$) {
                 service    => $service,
                 cmd        => $cmd,
                 type       => $type,
+                httpversion => "1.1",
                 callback   => \&THINKINGCLEANER_ReceiveCommand,
             }
         );