diff --git a/Gemfile.lock b/Gemfile.lock
index a0893d5887c..8493d7653a0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
       public_suffix (>= 2.0.2, < 5.0)
     chunky_png (1.4.0)
     colorator (1.1.0)
-    commonmarker (0.21.1)
+    commonmarker (0.21.2)
       ruby-enum (~> 0.5)
     compass (1.0.3)
       chunky_png (~> 1.2)