diff --git a/Gemfile.lock b/Gemfile.lock
index a1d31db98..ae686984a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -130,7 +130,8 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    commonmarker (0.23.10)
+    commonmarker (2.0.2)
+      rb_sys (~> 0.9)
     concurrent-ruby (1.3.4)
     crass (1.0.6)
     css_parser (1.14.0)
@@ -356,6 +357,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
+    rb_sys (0.9.105)
     regexp_parser (2.9.3)
     rexml (3.3.9)
     rolify (6.0.1)