--- rebar.config.orig	2017-06-23 09:06:28 UTC
+++ rebar.config
@@ -1,4 +1,4 @@
-{require_otp_vsn, "17|18|19"}.
+{require_otp_vsn, "17|18|19|20"}.
 
 {erl_opts, [fail_on_warning, debug_info, warn_untyped_record]}.
 %%, {parse_transform, eqc_cover}]}.