diff --git a/Gemfile b/Gemfile
index 98fd26f..5384d66 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,4 +3,4 @@ source 'https://rubygems.org'
 gem "rake"
 gem "jekyll", "~>2.5.3"
 gem "coderay", "~>1.0.0"
-gem "kramdown"
+gem "kramdown" , "1.5.0"
diff --git a/Gemfile.lock b/Gemfile.lock
index bc54f15..d7a4068 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -71,5 +71,8 @@ PLATFORMS
 DEPENDENCIES
   coderay (~> 1.0.0)
   jekyll (~> 2.5.3)
-  kramdown
+  kramdown (= 1.5.0)
   rake
+
+BUNDLED WITH
+   1.11.2