diff --git a/Gemfile.lock b/Gemfile.lock
index f7d2d92..77a9978 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,7 +92,8 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    kramdown (2.0.0)
+    kramdown (2.3.1)
+      rexml
     libv8 (6.7.288.46.1)
     liquid (4.0.1)
     listen (3.1.5)
@@ -107,7 +108,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     mini_racer (0.2.4)
@@ -156,6 +159,7 @@ GEM
     rb-inotify (0.10.0)
       ffi (~> 1.0)
     redis (4.1.0)
+    rexml (3.2.4)
     ruby_dep (1.5.0)
     sass (3.7.3)
       sass-listen (~> 4.0.0)