diff --git a/Gemfile.lock b/Gemfile.lock
index 4815ff2..a0ea681 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,8 +37,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       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)
     airbrussh (1.3.2)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (6.0.4)
@@ -138,7 +138,7 @@ GEM
     nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
     pg (0.21.0)
-    public_suffix (3.1.1)
+    public_suffix (5.0.0)
     rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)