diff --git a/src/applications/conduit/method/ConduitConnectConduitAPIMethod.php b/src/applications/conduit/method/ConduitConnectConduitAPIMethod.php
--- a/src/applications/conduit/method/ConduitConnectConduitAPIMethod.php
+++ b/src/applications/conduit/method/ConduitConnectConduitAPIMethod.php
@@ -77,10 +77,6 @@
         $server_version = 6;
         $supported_versions = array(
           $server_version => true,
-          // Client version 5 introduced "user.query" call
-          4               => true,
-          // Client version 6 introduced "diffusion.getlintmessages" call
-          5               => true,
         );
 
         if (empty($supported_versions[$client_version])) {