diff --git a/rebar3 b/rebar3
new file mode 100755
index 000000000..41e42ba3c
Binary files /dev/null and b/rebar3 differ
diff --git a/src/emqx.appup.src b/src/emqx.appup.src
index bb3809156..cc436053c 100644
--- a/src/emqx.appup.src
+++ b/src/emqx.appup.src
@@ -8,6 +8,10 @@
     end,
 {VSN,
   [
+    {"4.2.9", [
+      {load_module, emqx_connection, brutal_purge, soft_purge, []},
+      {load_module, emqx_ws_connection, brutal_purge, soft_purge, []}
+    ]},
     {<<"4.2.[34567]">>, [
       {load_module, emqx_frame, brutal_purge, soft_purge, []}
     ]},