--- mail-iso-2022-jp.gemspec.orig	2018-10-20 07:35:25 UTC
+++ mail-iso-2022-jp.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |s|
     s.specification_version = 4
 
     if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
-      s.add_runtime_dependency(%q<mail>.freeze, [">= 2.2.6", "<= 2.7.0"])
+      s.add_runtime_dependency(%q<mail>.freeze, [">= 2.2.6"])
       s.add_development_dependency(%q<actionmailer>.freeze, [">= 3.0.0", "< 6.0"])
       s.add_development_dependency(%q<rdoc>.freeze, [">= 3.12", "< 5.0"])
     else