diff --git a/Gemfile.lock b/Gemfile.lock
index 319b058..25c1bac 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,8 +18,7 @@ GEM
       tzinfo (~> 1.1)
     addressable (2.6.0)
       public_suffix (>= 2.0.2, < 4.0)
-    bourbon (5.1.0)
-      sass (~> 3.4)
+    bourbon (6.0.0)
       thor (~> 0.19)
     coderay (1.1.2)
     colorator (1.1.0)
@@ -132,7 +131,7 @@ GEM
       rack (> 1, < 3)
     svg_optimizer (0.2.5)
       nokogiri
-    thor (0.20.0)
+    thor (0.20.3)
     thread_safe (0.3.6)
     titlecase (0.1.1)
     tzinfo (1.2.5)