diff --git a/apps/emqx_plugin_libs/src/emqx_placeholder.erl b/apps/emqx_plugin_libs/src/emqx_placeholder.erl
index 70a1e41a5..f63f5eefc 100644
--- a/apps/emqx_plugin_libs/src/emqx_placeholder.erl
+++ b/apps/emqx_plugin_libs/src/emqx_placeholder.erl
@@ -39,7 +39,7 @@
     sql_data/1
 ]).
 
--define(EX_PLACE_HOLDER, "(\\$\\{[a-zA-Z0-9\\._]+\\}|\"\\$\\{[a-zA-Z0-9\\._]+\\}\")").
+-define(EX_PLACE_HOLDER, "(\\$\\{[a-zA-Z0-9\\._]+\\})").
 %% Space and CRLF
 -define(EX_WITHE_CHARS, "\\s").
 
@@ -235,9 +235,7 @@ get_phld_var(Phld, Data) ->
     emqx_rule_maps:nested_get(Phld, Data).
 
 preproc_var_re(#{placeholders := PHs}) ->
-    Res = [ph_to_re(PH) || PH <- PHs],
-    QuoteRes = ["\"" ++ Re ++ "\"" || Re <- Res],
-    "(" ++ string:join(Res ++ QuoteRes, "|") ++ ")";
+    "(" ++ string:join([ph_to_re(PH) || PH <- PHs], "|") ++ ")";
 preproc_var_re(#{}) ->
     ?EX_PLACE_HOLDER.
 
@@ -294,9 +292,7 @@ parse_nested(Attr) ->
     end.
 
 unwrap(<<"${", Val/binary>>) ->
-    binary:part(Val, {0, byte_size(Val) - 1});
-unwrap(<<"\"${", Val/binary>>) ->
-    binary:part(Val, {0, byte_size(Val) - 2}).
+    binary:part(Val, {0, byte_size(Val) - 1}).
 
 quote_sql(Str) ->
     quote(Str, <<"\\\\'">>).
diff --git a/apps/emqx_plugin_libs/src/emqx_plugin_libs.app.src b/apps/emqx_plugin_libs/src/emqx_plugin_libs.app.src
index 10df22d97..83af847ab 100644
--- a/apps/emqx_plugin_libs/src/emqx_plugin_libs.app.src
+++ b/apps/emqx_plugin_libs/src/emqx_plugin_libs.app.src
@@ -1,7 +1,7 @@
 %% -*- mode: erlang -*-
 {application, emqx_plugin_libs, [
     {description, "EMQX Plugin utility libs"},
-    {vsn, "4.3.3"},
+    {vsn, "4.3.2"},
     {modules, []},
     {applications, [kernel, stdlib]},
     {env, []}
diff --git a/apps/emqx_plugin_libs/test/emqx_placeholder_SUITE.erl b/apps/emqx_plugin_libs/test/emqx_placeholder_SUITE.erl
index ea642a9b0..5fcfb23e4 100644
--- a/apps/emqx_plugin_libs/test/emqx_placeholder_SUITE.erl
+++ b/apps/emqx_plugin_libs/test/emqx_placeholder_SUITE.erl
@@ -150,21 +150,6 @@ t_preproc_sql6(_) ->
         emqx_placeholder:proc_sql(ParamsTokens, Selected)
     ).
 
-t_preproc_sql7(_) ->
-    Selected = #{a => <<"a">>, b => <<"b">>},
-    {PrepareStatement, ParamsTokens} = emqx_placeholder:preproc_sql(
-        <<"a:\"${a}\",b:\"${b}\"">>,
-        #{
-            replace_with => '$n',
-            placeholders => [<<"${a}">>]
-        }
-    ),
-    ?assertEqual(<<"a:$1,b:\"${b}\"">>, PrepareStatement),
-    ?assertEqual(
-        [<<"a">>],
-        emqx_placeholder:proc_sql(ParamsTokens, Selected)
-    ).
-
 t_preproc_tmpl_deep(_) ->
     Selected = #{a => <<"1">>, b => 1, c => 1.0, d => #{d1 => <<"hi">>}},