diff --git a/apps/emqx_authz/src/emqx_authz.app.src b/apps/emqx_authz/src/emqx_authz.app.src
index 9de573795..5c3a26eb9 100644
--- a/apps/emqx_authz/src/emqx_authz.app.src
+++ b/apps/emqx_authz/src/emqx_authz.app.src
@@ -1,7 +1,7 @@
 %% -*- mode: erlang -*-
 {application, emqx_authz, [
     {description, "An OTP application"},
-    {vsn, "0.1.25"},
+    {vsn, "0.1.26"},
     {registered, []},
     {mod, {emqx_authz_app, []}},
     {applications, [
diff --git a/apps/emqx_authz/src/emqx_authz_http.erl b/apps/emqx_authz/src/emqx_authz_http.erl
index a5dff322d..ffc4045c5 100644
--- a/apps/emqx_authz/src/emqx_authz_http.erl
+++ b/apps/emqx_authz/src/emqx_authz_http.erl
@@ -200,7 +200,7 @@ generate_request(
         _ ->
             NPath = append_query(Path, Query),
             NBody = serialize_body(
-                proplists:get_value(<<"accept">>, Headers, <<"application/json">>),
+                proplists:get_value(<<"Content-Type">>, Headers, <<"application/json">>),
                 Body
             ),
             {NPath, Headers, NBody}