diff --git a/Gemfile.lock b/Gemfile.lock
index 38f3dab..20f88ca 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -48,7 +48,7 @@ GEM
       execjs
     bcrypt (3.1.13)
     bcrypt_pbkdf (1.0.1)
-    better_errors (2.5.1)
+    better_errors (2.8.0)
       coderay (>= 1.0.0)
       erubi (>= 1.0.0)
       rack (>= 0.9.0)
@@ -85,7 +85,7 @@ GEM
       capistrano-bundler
       puma (~> 4.0)
     choice (0.2.0)
-    coderay (1.1.2)
+    coderay (1.1.3)
     coffee-rails (4.1.1)
       coffee-script (>= 2.2.0)
       railties (>= 4.0.0, < 5.1.x)
@@ -110,7 +110,7 @@ GEM
     differ (0.1.2)
     ed25519 (1.2.4)
     encryptor (3.0.0)
-    erubi (1.9.0)
+    erubi (1.11.0)
     erubis (2.7.0)
     execjs (2.7.0)
     ffi (1.11.2)
@@ -161,7 +161,7 @@ GEM
       nio4r (~> 2.0)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
-    rack (1.6.11)
+    rack (1.6.13)
     rack-cors (1.0.6)
       rack (>= 1.6.0)
     rack-test (0.6.3)