diff --git a/ruby-units.gemspec b/ruby-units.gemspec
index 7208345c..dcb94a75 100644
--- a/ruby-units.gemspec
+++ b/ruby-units.gemspec
@@ -1,19 +1,19 @@
 # Generated by jeweler
 # DO NOT EDIT THIS FILE DIRECTLY
-# Instead, edit Jeweler::Tasks in Rakefile.rb, and run 'rake gemspec'
+# Instead, edit Jeweler::Tasks in Rakefile, and run 'rake gemspec'
 # -*- encoding: utf-8 -*-
-# stub: ruby-units 2.0.1 ruby lib
+# stub: ruby-units 2.1.0 ruby lib
 
 Gem::Specification.new do |s|
-  s.name = "ruby-units"
-  s.version = "2.0.1"
+  s.name = "ruby-units".freeze
+  s.version = "2.1.0"
 
-  s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
-  s.require_paths = ["lib"]
-  s.authors = ["Kevin Olbrich, Ph.D."]
-  s.date = "2016-07-28"
-  s.description = "Provides classes and methods to perform unit math and conversions"
-  s.email = ["kevin.olbrich+ruby_units@gmail.com"]
+  s.required_rubygems_version = Gem::Requirement.new(">= 0".freeze) if s.respond_to? :required_rubygems_version=
+  s.require_paths = ["lib".freeze]
+  s.authors = ["Kevin Olbrich, Ph.D.".freeze]
+  s.date = "2016-12-30"
+  s.description = "Provides classes and methods to perform unit math and conversions".freeze
+  s.email = ["kevin.olbrich+ruby_units@gmail.com".freeze]
   s.extra_rdoc_files = [
     "LICENSE.txt",
     "README.md"
@@ -22,11 +22,12 @@ Gem::Specification.new do |s|
     "CHANGELOG.txt",
     "LICENSE.txt",
     "README.md",
-    "Rakefile.rb",
+    "Rakefile",
     "VERSION",
     "lib/ruby-units.rb",
     "lib/ruby_units/array.rb",
     "lib/ruby_units/cache.rb",
+    "lib/ruby_units/configuration.rb",
     "lib/ruby_units/date.rb",
     "lib/ruby_units/definition.rb",
     "lib/ruby_units/math.rb",
@@ -42,30 +43,36 @@ Gem::Specification.new do |s|
     "lib/ruby_units/version.rb",
     "ruby-units.gemspec"
   ]
-  s.homepage = "https://github.com/olbrich/ruby-units"
-  s.licenses = ["MIT"]
-  s.rubygems_version = "2.5.1"
-  s.summary = "A class that performs unit conversions and unit math"
+  s.homepage = "https://github.com/olbrich/ruby-units".freeze
+  s.licenses = ["MIT".freeze]
+  s.rubygems_version = "2.6.8".freeze
+  s.summary = "A class that performs unit conversions and unit math".freeze
 
   if s.respond_to? :specification_version then
     s.specification_version = 4
 
     if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
-      s.add_development_dependency(%q<bundler>, ["~> 1.0"])
-      s.add_development_dependency(%q<jeweler>, [">= 0"])
-      s.add_development_dependency(%q<pry-byebug>, [">= 0"])
-      s.add_development_dependency(%q<guard-rspec>, [">= 0"])
+      s.add_development_dependency(%q<bundler>.freeze, ["~> 1.0"])
+      s.add_development_dependency(%q<guard-rspec>.freeze, [">= 0"])
+      s.add_development_dependency(%q<jeweler>.freeze, [">= 0"])
+      s.add_development_dependency(%q<pry>.freeze, [">= 0"])
+      s.add_development_dependency(%q<pry-byebug>.freeze, [">= 0"])
+      s.add_development_dependency(%q<terminal-notifier-guard>.freeze, [">= 0"])
     else
-      s.add_dependency(%q<bundler>, ["~> 1.0"])
-      s.add_dependency(%q<jeweler>, [">= 0"])
-      s.add_dependency(%q<pry-byebug>, [">= 0"])
-      s.add_dependency(%q<guard-rspec>, [">= 0"])
+      s.add_dependency(%q<bundler>.freeze, ["~> 1.0"])
+      s.add_dependency(%q<guard-rspec>.freeze, [">= 0"])
+      s.add_dependency(%q<jeweler>.freeze, [">= 0"])
+      s.add_dependency(%q<pry>.freeze, [">= 0"])
+      s.add_dependency(%q<pry-byebug>.freeze, [">= 0"])
+      s.add_dependency(%q<terminal-notifier-guard>.freeze, [">= 0"])
     end
   else
-    s.add_dependency(%q<bundler>, ["~> 1.0"])
-    s.add_dependency(%q<jeweler>, [">= 0"])
-    s.add_dependency(%q<pry-byebug>, [">= 0"])
-    s.add_dependency(%q<guard-rspec>, [">= 0"])
+    s.add_dependency(%q<bundler>.freeze, ["~> 1.0"])
+    s.add_dependency(%q<guard-rspec>.freeze, [">= 0"])
+    s.add_dependency(%q<jeweler>.freeze, [">= 0"])
+    s.add_dependency(%q<pry>.freeze, [">= 0"])
+    s.add_dependency(%q<pry-byebug>.freeze, [">= 0"])
+    s.add_dependency(%q<terminal-notifier-guard>.freeze, [">= 0"])
   end
 end