diff --git a/Gemfile b/Gemfile
index 0cc3f14..814fe8c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,12 +1,12 @@
 # A sample Gemfile
 source "http://rubygems.org"
 
-gem 'hoe'
-gem 'rdoc'
+gem 'hoe', '>= 3.16.0'
+gem 'rdoc', '>= 6.3.1'
 gem 'domainatrix'
 
 group :test do
   gem 'rspec'
-  gem 'simplecov'
+  gem 'simplecov', '>= 0.12.0'
   gem 'one_hundred_percent_coverage'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index dffdffa..42f3dc8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,19 +1,22 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    addressable (2.4.0)
+    addressable (2.8.3)
+      public_suffix (>= 2.0.2, < 6.0)
     diff-lcs (1.2.5)
-    docile (1.1.5)
+    docile (1.4.0)
     domainatrix (0.0.11)
       addressable
-    hoe (3.14.2)
-      rake (>= 0.8, < 11.0)
-    json (1.8.3)
+    hoe (4.0.2)
+      rake (>= 0.8, < 15.0)
     one_hundred_percent_coverage (0.0.2)
       simplecov (>= 0.3.7)
-    rake (10.5.0)
-    rdoc (4.2.2)
-      json (~> 1.4)
+    psych (5.1.0)
+      stringio
+    public_suffix (5.0.1)
+    rake (13.0.6)
+    rdoc (6.5.0)
+      psych (>= 4.0.0)
     rspec (3.4.0)
       rspec-core (~> 3.4.0)
       rspec-expectations (~> 3.4.0)
@@ -27,22 +30,24 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.4.0)
     rspec-support (3.4.1)
-    simplecov (0.11.2)
-      docile (~> 1.1.0)
-      json (~> 1.8)
-      simplecov-html (~> 0.10.0)
-    simplecov-html (0.10.0)
+    simplecov (0.22.0)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    stringio (3.0.5)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   domainatrix
-  hoe
+  hoe (>= 3.16.0)
   one_hundred_percent_coverage
-  rdoc
+  rdoc (>= 6.3.1)
   rspec
-  simplecov
+  simplecov (>= 0.12.0)
 
 BUNDLED WITH
-   1.11.2
+   1.17.3