diff --git a/Gemfile.lock b/Gemfile.lock
index 49192263687..f49eb7d18a9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -106,7 +106,7 @@ GEM
       bigdecimal
       rexml
     crass (1.0.6)
-    css_parser (1.16.0)
+    css_parser (1.17.1)
       addressable
     date (3.3.4)
     debug_inspector (1.2.0)