diff --git a/bootstrap b/bootstrap
index cc2a751..df09f7e 100755
--- a/bootstrap
+++ b/bootstrap
@@ -36,10 +36,11 @@ main(Args) ->
     %% Extract the system info of the version of OTP we use to compile rebar
     OtpInfo = string:strip(erlang:system_info(otp_release), both, $\n),
 
-    %% Types dict:dict() and digraph:digraph() have been introduced in Erlang 17.
-    %% At the same time, their counterparts dict() and digraph() are to be deprecated
-    %% in Erlang 18. namespaced_types option is used to select proper type name
-    %% depending of the OTP version used.
+    %% Types dict:dict() and digraph:digraph() have been introduced in
+    %% Erlang 17.
+    %% At the same time, their counterparts dict() and digraph() are to be
+    %% deprecated in Erlang 18. namespaced_types option is used to select
+    %% proper type name depending on the OTP version used.
     NamespacedTypes = case is_otp(OtpInfo, "^[0-9]+") of
                           true -> {d, namespaced_types};
                           false -> undefined
diff --git a/rebar.config b/rebar.config
index bf4ef4f..1c62a55 100644
--- a/rebar.config
+++ b/rebar.config
@@ -4,11 +4,16 @@
 %% escript_incl_extra is for internal rebar-private use only.
 %% Do not use outside rebar. Config interface is not stable.
 {escript_incl_extra, [{"priv/templates/*", "."}]}.
+
 %% Types dict:dict() and digraph:digraph() have been introduced in Erlang 17.
-%% At the same time, their counterparts dict() and digraph() are to be deprecated
-%% in Erlang 18. namespaced_types option is used to select proper type name
-%% depending of the OTP version used.
-{erl_opts, [{platform_define, "^[0-9]+", namespaced_types}, warnings_as_errors]}.
+%% At the same time, their counterparts dict() and digraph() are to be
+%% deprecated in Erlang 18. namespaced_types option is used to select proper
+%% type name depending on the OTP version used.
+{erl_opts,
+ [
+  {platform_define, "^[0-9]+", namespaced_types}
+ ]}.
+
 {xref_checks, []}.
 {xref_queries,
  [{"(XC - UC) || (XU - X - B
diff --git a/src/rebar_config.erl b/src/rebar_config.erl
index 1c90d22..bdc3fb5 100644
--- a/src/rebar_config.erl
+++ b/src/rebar_config.erl
@@ -40,10 +40,10 @@
 -include("rebar.hrl").
 
 -ifdef(namespaced_types).
-% dict:dict() exists starting from Erlang 17.
--type rebar_dict() :: dict:dict().
+%% dict:dict() exists starting from Erlang 17.
+-type rebar_dict() :: dict:dict(term(), term()).
 -else.
-% dict() has been obsoleted in Erlang 17 and deprecated in 18.
+%% dict() has been obsoleted in Erlang 17 and deprecated in 18.
 -type rebar_dict() :: dict().
 -endif.
 
diff --git a/src/rebar_erlc_compiler.erl b/src/rebar_erlc_compiler.erl
index 376cde5..f628433 100644
--- a/src/rebar_erlc_compiler.erl
+++ b/src/rebar_erlc_compiler.erl
@@ -48,10 +48,10 @@
         }).
 
 -ifdef(namespaced_types).
-% digraph:digraph() exists starting from Erlang 17.
--type rebar_digraph() :: digraph:digraph().
+%% digraph:graph() exists starting from Erlang 17.
+-type rebar_digraph() :: digraph:graph().
 -else.
-% digraph() has been obsoleted in Erlang 17 and deprecated in 18.
+%% digraph() has been obsoleted in Erlang 17 and deprecated in 18.
 -type rebar_digraph() :: digraph().
 -endif.