diff --git a/apps/emqx_dashboard/src/emqx_dashboard_swagger.erl b/apps/emqx_dashboard/src/emqx_dashboard_swagger.erl
index 7000fd5f3..976fa97cd 100644
--- a/apps/emqx_dashboard/src/emqx_dashboard_swagger.erl
+++ b/apps/emqx_dashboard/src/emqx_dashboard_swagger.erl
@@ -431,23 +431,21 @@ desc_struct(Hocon) ->
     case hocon_schema:field_schema(Hocon, desc) of
         undefined ->
             case hocon_schema:field_schema(Hocon, description) of
-                undefined ->
-                    case Hocon of
-                        ?R_REF(Mod, Name) ->
-                            case erlang:function_exported(Mod, desc, 1) of
-                                true -> Mod:desc(Name);
-                                false -> undefined
-                            end;
-                        _ ->
-                            undefined
-                    end;
-                Struct1 ->
-                    Struct1
+                undefined -> get_ref_desc(Hocon);
+                Struct1 -> Struct1
             end;
         Struct ->
             Struct
     end.
 
+get_ref_desc(?R_REF(Mod, Name)) ->
+    case erlang:function_exported(Mod, desc, 1) of
+        true -> Mod:desc(Name);
+        false -> undefined
+    end;
+get_ref_desc(_) ->
+    undefined.
+
 request_body(#{content := _} = Content, _Module, _Options) ->
     {Content, []};
 request_body([], _Module, _Options) ->
diff --git a/mix.exs b/mix.exs
index 50e39cd9e..b1e306ed8 100644
--- a/mix.exs
+++ b/mix.exs
@@ -57,7 +57,7 @@ defmodule EMQXUmbrella.MixProject do
       {:mria, github: "emqx/mria", tag: "0.2.5", override: true},
       {:ekka, github: "emqx/ekka", tag: "0.12.6", override: true},
       {:gen_rpc, github: "emqx/gen_rpc", tag: "2.8.1", override: true},
-      {:minirest, github: "emqx/minirest", tag: "1.3.2", override: true},
+      {:minirest, github: "emqx/minirest", tag: "1.3.3", override: true},
       {:ecpool, github: "emqx/ecpool", tag: "0.5.2"},
       {:replayq, "0.3.4", override: true},
       {:pbkdf2, github: "emqx/erlang-pbkdf2", tag: "2.0.4", override: true},
diff --git a/rebar.config b/rebar.config
index 164532b41..692a5dfed 100644
--- a/rebar.config
+++ b/rebar.config
@@ -57,7 +57,7 @@
     , {mria, {git, "https://github.com/emqx/mria", {tag, "0.2.5"}}}
     , {ekka, {git, "https://github.com/emqx/ekka", {tag, "0.12.6"}}}
     , {gen_rpc, {git, "https://github.com/emqx/gen_rpc", {tag, "2.8.1"}}}
-    , {minirest, {git, "https://github.com/emqx/minirest", {tag, "1.3.2"}}}
+    , {minirest, {git, "https://github.com/emqx/minirest", {tag, "1.3.3"}}}
     , {ecpool, {git, "https://github.com/emqx/ecpool", {tag, "0.5.2"}}}
     , {replayq, "0.3.4"}
     , {pbkdf2, {git, "https://github.com/emqx/erlang-pbkdf2.git", {tag, "2.0.4"}}}