diff --git a/Gemfile.lock b/Gemfile.lock
index 3ef28ca..dde2351 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,11 +24,13 @@ GEM
       kramdown (>= 0.13.2)
       liquid (>= 1.9.0)
       maruku (>= 0.5.9)
-    kramdown (0.13.3)
+    kramdown (2.3.0)
+      rexml
     liquid (2.3.0)
     maruku (0.6.0)
       syntax (>= 1.0.0)
     posix-spawn (0.3.6)
+    rexml (3.2.4)
     sass (3.1.10)
     syntax (1.0.0)