diff --git a/Gemfile.lock b/Gemfile.lock
index dec613c..df18900 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -49,7 +49,7 @@ GEM
     i18n (1.8.3)
       concurrent-ruby (~> 1.0)
     jaro_winkler (1.5.4)
-    kramdown (2.2.1)
+    kramdown (2.3.1)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)