diff --git a/apktools.gemspec b/apktools.gemspec
index 2f0b8c8..0dc0b8e 100644
--- a/apktools.gemspec
+++ b/apktools.gemspec
@@ -30,5 +30,5 @@ Gem::Specification.new do |s|
 
   s.executables << 'get_app_version.rb'
   s.executables << 'read_manifest.rb'
-  s.add_runtime_dependency 'rubyzip', '~> 2.0'
+  s.add_runtime_dependency 'rubyzip', '>= 2.0', '< 4.0'
 end