diff --git a/Gemfile b/Gemfile
index e1699997..f82688b3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,6 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem 'descendants_tracker', :git => 'https://github.com/dkubb/descendants_tracker.git'
 gem 'abstract_class',      :git => 'https://github.com/dkubb/abstract_class.git'
 gem 'to_source',           :git => 'https://github.com/mbj/to_source.git'
 gem 'melbourne',           :git => 'https://github.com/mbj/melbourne.git'