diff --git a/Gemfile.lock b/Gemfile.lock
index eccb2d8..886bd52 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,9 +29,10 @@ GEM
       tzinfo (~> 1.1)
     addressable (2.3.6)
     arel (5.0.1.20140414130214)
-    better_errors (1.1.0)
+    better_errors (2.8.0)
       coderay (>= 1.0.0)
-      erubis (>= 2.6.6)
+      erubi (>= 1.0.0)
+      rack (>= 0.9.0)
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
     builder (3.2.2)
@@ -46,7 +47,7 @@ GEM
       xpath (~> 2.0)
     celluloid (0.16.0)
       timers (~> 4.0.0)
-    coderay (1.1.0)
+    coderay (1.1.3)
     coffee-rails (4.0.1)
       coffee-script (>= 2.2.0)
       railties (>= 4.0.0, < 5.0)
@@ -60,6 +61,7 @@ GEM
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
+    erubi (1.10.0)
     erubis (2.7.0)
     eventmachine (1.0.3)
     execjs (2.0.2)