diff --git a/scientist.gemspec b/scientist.gemspec
index c97b6f5..81f7fb4 100644
--- a/scientist.gemspec
+++ b/scientist.gemspec
@@ -18,6 +18,5 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
 
   gem.add_development_dependency "minitest", "~> 5.8"
-  gem.add_development_dependency "coveralls", "~> 0.8"
   gem.add_development_dependency "rake"
 end