--- googleauth.gemspec.orig	2017-10-18 16:58:21 UTC
+++ googleauth.gemspec
@@ -27,7 +27,7 @@ Gem::Specification.new do |s|
       s.add_runtime_dependency(%q<jwt>.freeze, ["< 3.0", ">= 1.4"])
       s.add_runtime_dependency(%q<memoist>.freeze, ["~> 0.12"])
       s.add_runtime_dependency(%q<multi_json>.freeze, ["~> 1.11"])
-      s.add_runtime_dependency(%q<os>.freeze, ["~> 0.9"])
+      s.add_runtime_dependency(%q<os>.freeze, [">= 0.9"])
       s.add_runtime_dependency(%q<signet>.freeze, ["~> 0.7"])
     else
       s.add_dependency(%q<faraday>.freeze, ["~> 0.12"])