diff --git a/Gemfile b/Gemfile
index 7bd3410ba..3a3f3371e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,5 +2,6 @@ source 'https://rubygems.org'
 
 group :development do
   gem 'jekyll', '>= 3.0.0.pre.beta8'
+  gem 'jekyll-last-modified-at'
   gem 'stringex'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 7db86090d..8525d6cb6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,6 +15,8 @@ GEM
       mercenary (~> 0.3.3)
       rouge (~> 1.7)
       safe_yaml (~> 1.0)
+    jekyll-last-modified-at (0.3.4)
+      jekyll
     jekyll-sass-converter (1.3.0)
       sass (~> 3.2)
     jekyll-watch (1.2.1)
@@ -41,6 +43,7 @@ PLATFORMS
 
 DEPENDENCIES
   jekyll (>= 3.0.0.pre.beta8)
+  jekyll-last-modified-at
   stringex
 
 BUNDLED WITH
diff --git a/_config.yml b/_config.yml
index 7c3d607e8..a10ba4d4b 100644
--- a/_config.yml
+++ b/_config.yml
@@ -54,6 +54,13 @@ redcarpet:
     - superscript
     - tables
 
+#
+# Jekyll plugins
+#
+
+gems:
+  - jekyll-last-modified-at
+
 #
 # Almace Scaffolding settings
 #