diff --git a/Gemfile.lock b/Gemfile.lock
index a2c45a41..deab4c98 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,10 +6,10 @@ GEM
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
       tzinfo (~> 2.0)
-    better_errors (2.9.1)
-      coderay (>= 1.0.0)
+    better_errors (2.10.0)
       erubi (>= 1.0.0)
       rack (>= 0.9.0)
+      rouge (>= 1.0.0)
     browser (5.3.1)
     byebug (11.1.3)
     chunky_png (1.4.0)
@@ -82,6 +82,7 @@ GEM
       ffi (~> 1.0)
     redcarpet (3.6.0)
     rexml (3.2.5)
+    rouge (1.11.1)
     rr (3.1.0)
     rss (0.2.9)
       rexml