diff --git a/Gemfile.lock b/Gemfile.lock
index 88fc1fb..0929aa6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -181,7 +181,7 @@ GEM
       ruby-progressbar (~> 1.4)
     ruby-progressbar (1.7.5)
     safe_yaml (1.0.4)
-    sass (3.4.17)
+    sass (3.4.18)
     sass-rails (5.0.3)
       railties (>= 4.0.0, < 5.0)
       sass (~> 3.1)