diff --git a/Gemfile.lock b/Gemfile.lock
index d02451e..995507f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,7 +44,7 @@ GEM
     forwardable-extended (2.6.0)
     i18n (1.8.3)
       concurrent-ruby (~> 1.0)
-    kramdown (2.2.1)
+    kramdown (2.3.1)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)