diff --git a/Gemfile.lock b/Gemfile.lock
index cedbe2c..da764c9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,8 +43,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     arel (8.0.0)
     babel-source (5.8.35)
     babel-transpiler (0.7.0)
@@ -136,7 +136,7 @@ GEM
     pry-stack_explorer (0.4.9.2)
       binding_of_caller (>= 0.7)
       pry (>= 0.9.11)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     puma (3.12.6)
     rack (2.2.3)
     rack-test (1.1.0)