diff --git a/src/emqx.appup.src b/src/emqx.appup.src
index fc6ccd606..56718e59e 100644
--- a/src/emqx.appup.src
+++ b/src/emqx.appup.src
@@ -7,8 +7,6 @@
     , {load_module,emqx_channel,brutal_purge,soft_purge,[]}
     , {load_module,emqx_connection,brutal_purge,soft_purge,[]}
     , {load_module,emqx_alarm,brutal_purge,soft_purge,[]}
-    , {load_module,emqx_slow_subs,brutal_purge,soft_purge,[]}
-    , {load_module,emqx_slow_subs_api,brutal_purge,soft_purge,[]}
     , {load_module,emqx_mod_sup,brutal_purge,soft_purge,[]}
     , {load_module,emqx_session,brutal_purge,soft_purge,[]}
     , {load_module,emqx_os_mon,brutal_purge,soft_purge,[]}
@@ -25,8 +23,6 @@
     , {load_module,emqx_channel,brutal_purge,soft_purge,[]}
     , {load_module,emqx_connection,brutal_purge,soft_purge,[]}
     , {load_module,emqx_alarm,brutal_purge,soft_purge,[]}
-    , {load_module,emqx_slow_subs,brutal_purge,soft_purge,[]}
-    , {load_module,emqx_slow_subs_api,brutal_purge,soft_purge,[]}
     , {load_module,emqx_mod_sup,brutal_purge,soft_purge,[]}
     , {load_module,emqx_session,brutal_purge,soft_purge,[]}
     , {load_module,emqx_os_mon,brutal_purge,soft_purge,[]}