diff --git a/statsample-glm.gemspec b/statsample-glm.gemspec
index 19b31b2..af7872d 100644
--- a/statsample-glm.gemspec
+++ b/statsample-glm.gemspec
@@ -27,7 +27,7 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.add_runtime_dependency 'daru', '~> 0.1'
+  spec.add_runtime_dependency 'daru', '~> 0.2'
   spec.add_runtime_dependency 'statsample', '~> 2.0'
 
   spec.add_development_dependency 'bundler', '~> 1.10'