diff --git a/rails-reverse-proxy.gemspec b/rails-reverse-proxy.gemspec
index d69a23e..a7c3a52 100644
--- a/rails-reverse-proxy.gemspec
+++ b/rails-reverse-proxy.gemspec
@@ -20,6 +20,7 @@ Gem::Specification.new do |s|
   ]
   s.files = [
     ".document",
+    ".ruby-version",
     "Gemfile",
     "Gemfile.lock",
     "LICENSE",
@@ -35,7 +36,7 @@ Gem::Specification.new do |s|
   ]
   s.homepage = "http://github.com/axsuul/rails-reverse-proxy".freeze
   s.licenses = ["MIT".freeze]
-  s.rubygems_version = "3.0.3".freeze
+  s.rubygems_version = "2.6.13".freeze
   s.summary = "Reverse proxy for Ruby on Rails".freeze
 
   if s.respond_to? :specification_version then