diff --git a/gollum.gemspec b/gollum.gemspec
index e735744b..86751793 100644
--- a/gollum.gemspec
+++ b/gollum.gemspec
@@ -2,6 +2,7 @@ Gem::Specification.new do |s|
   s.specification_version = 2 if s.respond_to? :specification_version=
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.rubygems_version = '1.3.5'
+  s.required_ruby_version = ">= 1.8.7"
 
   s.name              = 'gollum'
   s.version           = '2.1.0'