diff --git a/src/emqx.appup.src b/src/emqx.appup.src
index 74f3135e0..30089180f 100644
--- a/src/emqx.appup.src
+++ b/src/emqx.appup.src
@@ -126,9 +126,13 @@
      {load_module, emqx_frame, brutal_purge, soft_purge, []},
      {load_module, emqx_channel, brutal_purge, soft_purge, []},
      {load_module, emqx_connection, brutal_purge, soft_purge, []},
+     {load_module, emqx_ws_connection, brutal_purge, soft_purge, []},
      {load_module, emqx_cm, brutal_purge, soft_purge, []}
    ]},
    {<<"4.2.9">>, [
+     {load_module, emqx_frame, brutal_purge, soft_purge, []},
+     {load_module, emqx_connection, brutal_purge, soft_purge, []},
+     {load_module, emqx_ws_connection, brutal_purge, soft_purge, []},
      {load_module, emqx_zone, brutal_purge, soft_purge, []}
    ]},
    {<<".*">>, []}
@@ -258,9 +262,13 @@
      {load_module, emqx_frame, brutal_purge, soft_purge, []},
      {load_module, emqx_channel, brutal_purge, soft_purge, []},
      {load_module, emqx_connection, brutal_purge, soft_purge, []},
+     {load_module, emqx_ws_connection, brutal_purge, soft_purge, []},
      {load_module, emqx_cm, brutal_purge, soft_purge, []}
    ]},
    {<<"4.2.9">>, [
+     {load_module, emqx_frame, brutal_purge, soft_purge, []},
+     {load_module, emqx_connection, brutal_purge, soft_purge, []},
+     {load_module, emqx_ws_connection, brutal_purge, soft_purge, []},
      {load_module, emqx_zone, brutal_purge, soft_purge, []}
    ]},
    {<<".*">>, []}