diff --git a/homesick.gemspec b/homesick.gemspec
index df81993..9ceecb1 100644
--- a/homesick.gemspec
+++ b/homesick.gemspec
@@ -9,6 +9,7 @@ Gem::Specification.new do |s|
   s.version = "1.1.0"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
+  s.required_ruby_version = '>= 1.9.3'
   s.require_paths = ["lib"]
   s.authors = ["Joshua Nichols", "Yusuke Murata"]
   s.date = "2014-04-29"