diff --git a/rebar.config b/rebar.config
index d2a0430..2421335 100644
--- a/rebar.config
+++ b/rebar.config
@@ -6,7 +6,7 @@
         {ibrowse, {git, "https://github.com/cmullaparthi/ibrowse.git", {ref, "v4.4.0"}}}
        ]}.
 
-{require_otp_vsn, "R16|17|18|19"}.
+{require_otp_vsn, "R16|17|18|19|20"}.
 
 {erl_opts, [
             fail_on_warning,