From 2847c083b32265fb111f9d1c79cb4c639060417c Mon Sep 17 00:00:00 2001
From: Joseph Wynn <joseph@wildlyinaccurate.com>
Date: Wed, 4 Nov 2015 23:09:14 +0000
Subject: [PATCH] Only allow Jekyll 3.x on Ruby >2.0

---
 jekyll-responsive_image.gemspec | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/jekyll-responsive_image.gemspec b/jekyll-responsive_image.gemspec
index 10b04ac..1dfc8a7 100644
--- a/jekyll-responsive_image.gemspec
+++ b/jekyll-responsive_image.gemspec
@@ -22,6 +22,12 @@ Gem::Specification.new do |spec|
   spec.executables  = []
   spec.require_path = 'lib'
 
-  spec.add_runtime_dependency 'jekyll', ['>= 2.0', '< 4.0']
+  if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.0.0')
+    max_jekyll_version = '3.0'
+  else
+    max_jekyll_version = '4.0'
+  end
+
+  spec.add_runtime_dependency 'jekyll', ['>= 2.0', "< #{max_jekyll_version}"]
   spec.add_runtime_dependency 'rmagick'
 end