diff --git a/Gemfile.lock b/Gemfile.lock
index d252b23..4a079b5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -31,7 +31,7 @@ GEM
       execjs
     coffee-script-source (1.11.1)
     colorator (1.1.0)
-    commonmarker (0.23.6)
+    commonmarker (0.23.9)
     concurrent-ruby (1.1.10)
     diff-lcs (1.5.0)
     dnsruby (1.61.9)