diff --git a/Gemfile.lock b/Gemfile.lock
index 110208c7d5d..62777c6de70 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -111,7 +111,7 @@ GEM
     crack (0.4.5)
       rexml
     crass (1.0.6)
-    css_parser (1.11.0)
+    css_parser (1.12.0)
       addressable
     debug_inspector (1.1.0)
     diff-lcs (1.5.0)