diff --git a/Gemfile.lock b/Gemfile.lock
index a3f5bb5..411cc99 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,8 +38,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     arel (7.1.4)
     bcrypt (3.1.13)
     bootsnap (1.4.0)
@@ -136,7 +136,7 @@ GEM
       oauth2 (~> 1.1)
       omniauth (~> 1.9)
     orm_adapter (0.5.0)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     rack (2.0.6)
     rack-test (0.6.3)
       rack (>= 1.0)