diff --git a/plugins/override_opts.erl b/plugins/override_opts.erl
index 1d321fc87..818f53e87 100644
--- a/plugins/override_opts.erl
+++ b/plugins/override_opts.erl
@@ -9,6 +9,11 @@ override_opts(add, Config, Opts) ->
     lists:foldl(fun({Opt, Value}, Conf) ->
 			V = rebar_config:get_local(Conf, Opt, []),
 			rebar_config:set(Conf, Opt, V ++ Value)
+		end, Config, Opts);
+override_opts(del, Config, Opts) ->
+    lists:foldl(fun({Opt, Value}, Conf) ->
+			V = rebar_config:get_local(Conf, Opt, []),
+			rebar_config:set(Conf, Opt, V -- Value)
 		end, Config, Opts).
 
 preprocess(Config, _Dirs) ->
@@ -24,6 +29,8 @@ preprocess(Config, _Dirs) ->
 		      lists:foldl(fun({Type, AppName2, Opts}, Conf1) when
 					    AppName2 == AppName ->
 					  override_opts(Type, Conf1, Opts);
+				     ({Type, Opts}, Conf1a) ->
+					  override_opts(Type, Conf1a, Opts);
 				     (_, Conf2) ->
 					  Conf2
 				  end, C, TopOverrides);
diff --git a/rebar.config b/rebar.config
index 94a936b7e..08042444d 100644
--- a/rebar.config
+++ b/rebar.config
@@ -30,7 +30,7 @@
         {jiffy, ".*", {git, "https://github.com/davisp/jiffy", {tag, "0.14.8"}}},
         {p1_oauth2, ".*", {git, "https://github.com/processone/p1_oauth2", {tag, "0.6.5"}}},
         {pkix, ".*", {git, "https://github.com/processone/pkix", {tag, "1.0.2"}}},
-        {jose, ".*", {git, "https://github.com/potatosalad/erlang-jose", {tag, "1.9.0"}}},
+        {jose, ".*", {git, "https://github.com/potatosalad/erlang-jose", {tag, "1.8.4"}}},
         {eimp, ".*", {git, "https://github.com/processone/eimp", "172fae666e8da40142e9a17d9f9a154c6b697c9b"}},
         {mqtree, ".*", {git, "https://github.com/processone/mqtree", {tag, "1.0.3"}}},
         {if_var_true, stun, {stun, ".*", {git, "https://github.com/processone/stun", {tag, "1.0.28"}}}},
@@ -148,6 +148,9 @@
 {cover_export_enabled, true}.
 {recursive_cmds, ['configure-deps']}.
 
+{overrides, [
+  {del, [{erl_opts, [warnings_as_errors]}]}]}.
+
 {post_hook_configure, [{"fast_tls", []},
                        {"stringprep", []},
                        {"fast_yaml", []},