diff --git a/Gemfile.lock b/Gemfile.lock
index 2a79ae7..ba046f2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,16 +43,16 @@ GEM
       rake (>= 0.8.7)
     arel (7.1.4)
     bcrypt (3.1.11)
-    better_errors (2.1.1)
+    better_errors (2.8.0)
       coderay (>= 1.0.0)
-      erubis (>= 2.6.6)
+      erubi (>= 1.0.0)
       rack (>= 0.9.0)
     bindex (0.5.0)
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
     builder (3.2.3)
     byebug (9.0.6)
-    coderay (1.1.1)
+    coderay (1.1.3)
     coffee-rails (4.2.2)
       coffee-script (>= 2.2.0)
       railties (>= 4.0.0)
@@ -62,6 +62,7 @@ GEM
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
     debug_inspector (0.0.2)
+    erubi (1.10.0)
     erubis (2.7.0)
     execjs (2.7.0)
     ffi (1.9.18)
@@ -106,7 +107,7 @@ GEM
       multi_json (~> 1.0)
       pusher-signature (~> 0.1.8)
     pusher-signature (0.1.8)
-    rack (2.0.3)
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.3)