diff --git a/lib/twitter/response/parse_json.rb b/lib/twitter/response/parse_json.rb
index cc125c021..3679fab72 100644
--- a/lib/twitter/response/parse_json.rb
+++ b/lib/twitter/response/parse_json.rb
@@ -7,7 +7,7 @@ class ParseJson < Faraday::Response::Middleware
 
       def parse(body)
         case body
-        when '', nil
+        when /\A^\s*$\z/, nil
           nil
         when 'true'
           true