diff --git a/Gemfile.lock b/Gemfile.lock
index bc25704..a315f82 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,7 +29,7 @@ GEM
     hashie (3.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    kramdown (2.3.0)
+    kramdown (2.3.1)
       rexml
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -93,6 +93,7 @@ GEM
       execjs (>= 0.3.0, < 3)
 
 PLATFORMS
+  ruby
   x86_64-linux
 
 DEPENDENCIES