diff --git a/Gemfile b/Gemfile
index 8d3cd09bba..37b3eb3195 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,14 +2,14 @@ source "http://rubygems.org"
 
 gem 'builder'
 gem 'coderay'
-gem 'kramdown', '~> 0.13.2'
+gem 'kramdown', '~> 2.3.1'
 gem 'mime-types', '~> 1.16'
 gem 'nanoc', '~> 3.4.3'
-gem 'nokogiri', '~> 1.4.4'
+gem 'nokogiri', '~> 1.18.9'
 gem 'pygments.rb'
-gem 'rake', '~> 0.9.2'
+gem 'rake', '~> 12.3.3'
 gem 'thin'
-gem 'yajl-ruby', '~> 0.8.2'
+gem 'yajl-ruby', '~> 1.4.3'
 
 group :development do
   gem 'adsf'
diff --git a/Gemfile.lock b/Gemfile.lock
index b04fe4df5a..8fa9325521 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,6 @@ GEM
   specs:
     adsf (1.1.1)
       rack (>= 1.0.0)
-    blankslate (2.1.2.4)
     builder (3.1.3)
     coderay (1.0.6)
     colored (1.2)
@@ -11,25 +10,26 @@ GEM
       colored (>= 1.2)
     daemons (1.1.8)
     eventmachine (1.0.0.rc.4)
-    ffi (1.0.11)
     fssm (0.2.9)
-    kramdown (0.13.7)
+    kramdown (2.3.1)
+      rexml
     mime-types (1.18)
+    mini_portile2 (2.8.9)
     nanoc (3.4.3)
       cri (~> 2.2)
-    nokogiri (1.4.7)
-    pygments.rb (0.2.12)
-      rubypython (~> 0.5.3)
-    rack (1.4.1)
-    rake (0.9.2.2)
-    rubypython (0.5.3)
-      blankslate (>= 2.1.2.3)
-      ffi (~> 1.0.7)
+    nokogiri (1.18.9)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
+    pygments.rb (4.0.0)
+    racc (1.8.1)
+    rack (2.2.20)
+    rake (12.3.3)
+    rexml (3.4.4)
     thin (1.4.1)
       daemons (>= 1.0.9)
       eventmachine (>= 0.12.6)
       rack (>= 1.0.0)
-    yajl-ruby (0.8.3)
+    yajl-ruby (1.4.3)
 
 PLATFORMS
   ruby
@@ -39,11 +39,11 @@ DEPENDENCIES
   builder
   coderay
   fssm
-  kramdown (~> 0.13.2)
+  kramdown (~> 2.3.1)
   mime-types (~> 1.16)
   nanoc (~> 3.4.3)
-  nokogiri (~> 1.4.4)
+  nokogiri (~> 1.18.9)
   pygments.rb
-  rake (~> 0.9.2)
+  rake (~> 12.3.3)
   thin
-  yajl-ruby (~> 0.8.2)
+  yajl-ruby (~> 1.4.3)