diff --git a/Gemfile.lock b/Gemfile.lock
index 865c3c6..6c76192 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -168,7 +168,8 @@ GEM
       activerecord
       kaminari-core (= 1.1.1)
     kaminari-core (1.1.1)
-    kramdown (1.17.0)
+    kramdown (2.3.0)
+      rexml
     launchy (2.4.3)
       addressable (~> 2.3)
     letter_opener (1.7.0)
@@ -257,6 +258,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
+    rexml (3.2.4)
     rspec-core (3.8.0)
       rspec-support (~> 3.8.0)
     rspec-expectations (3.8.2)