diff --git a/Gemfile.lock b/Gemfile.lock
index 1b2aedde0..5d332637a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -129,7 +129,8 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    commonmarker (0.23.10)
+    commonmarker (1.1.3)
+      rb_sys (~> 0.9)
     concurrent-ruby (1.2.3)
     crass (1.0.6)
     css_parser (1.14.0)
@@ -353,6 +354,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
+    rb_sys (0.9.97)
     regexp_parser (2.9.0)
     rexml (3.2.8)
       strscan (>= 3.0.9)