diff --git a/Gemfile.lock b/Gemfile.lock
index 627ff3d06ef9..f4dbf018e9e1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -60,7 +60,8 @@ GEM
       jekyll
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (2.1.0)
+    kramdown (2.4.0)
+      rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
@@ -86,6 +87,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
+    rexml (3.2.5)
     rouge (3.17.0)
     ruby-enum (0.8.0)
       i18n