diff --git a/src/jsx_verify.erl b/src/jsx_verify.erl
index 2073b99..5f4a3d8 100644
--- a/src/jsx_verify.erl
+++ b/src/jsx_verify.erl
@@ -27,7 +27,7 @@
 -export([init/1, handle_event/2]).
 
 
--spec is_json(Source::binary(), Config::jsx_config:config()) -> true | false | {incomplete, jsx:decoder()}.
+-spec is_json(Source::binary(), Config::proplists:proplist()) -> true | false | {incomplete, jsx:decoder()}.
 
 is_json(Source, Config) when is_list(Config) ->
     try (jsx:decoder(?MODULE, Config, jsx_config:extract_config(Config)))(Source)
@@ -35,7 +35,7 @@ is_json(Source, Config) when is_list(Config) ->
     end.
 
 
--spec is_term(Source::any(), Config::jsx_config:config()) -> true | false | {incomplete, jsx:encoder()}.
+-spec is_term(Source::any(), Config::proplists:proplist()) -> true | false | {incomplete, jsx:encoder()}.
 
 is_term(Source, Config) when is_list(Config) ->
     try (jsx:encoder(?MODULE, Config, jsx_config:extract_config(Config)))(Source)