diff --git a/Gemfile.lock b/Gemfile.lock
index d778acc..61d31ba 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,6 +1,10 @@
 GEM
-  remote: https://rubygems.org/
   remote: https://rails-assets.org/
+  specs:
+    rails-assets-tether (1.4.7)
+
+GEM
+  remote: https://rubygems.org/
   specs:
     actioncable (5.2.3)
       actionpack (= 5.2.3)
@@ -43,8 +47,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     archive-zip (0.12.0)
       io-like (~> 0.3.0)
     arel (9.0.0)
@@ -181,7 +185,7 @@ GEM
     orm_adapter (0.5.0)
     pg (1.1.4)
     popper_js (1.11.1)
-    public_suffix (3.1.1)
+    public_suffix (4.0.7)
     puma (3.12.1)
     rack (2.0.7)
     rack-cors (1.1.0)
@@ -201,7 +205,6 @@ GEM
       bundler (>= 1.3.0)
       railties (= 5.2.3)
       sprockets-rails (>= 2.0.0)
-    rails-assets-tether (1.4.7)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)