diff --git a/Gemfile.lock b/Gemfile.lock
index 8a1c97f7..faaa8246 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -69,9 +69,8 @@ GEM
       uuidtools
     arel (6.0.4)
     ast (2.3.0)
-    autoprefixer-rails (5.1.9)
+    autoprefixer-rails (7.1.1)
       execjs
-      json
     awesome_nested_set (3.1.3)
       activerecord (>= 4.0.0, < 5.2)
     aws_cf_signer (0.1.3)