diff --git a/Gemfile.lock b/Gemfile.lock
index ba1eddd6..b7a0d1f9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -86,10 +86,10 @@ GEM
     amq-protocol (2.3.2)
     ast (2.4.2)
     bcrypt (3.1.18)
-    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)
     bindex (0.8.1)
     binding_of_caller (1.0.0)
       debug_inspector (>= 0.0.1)
@@ -351,6 +351,7 @@ GEM
     rbtree (0.4.6)
     regexp_parser (2.8.0)
     rexml (3.2.5)
+    rouge (4.1.0)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)