diff --git a/Gemfile.lock b/Gemfile.lock
index 5f838c5..5012214 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -72,8 +72,8 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
       zeitwerk (~> 2.2)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arbre (1.2.1)
       activesupport (>= 3.0.0)
     aws_cf_signer (0.1.3)
@@ -183,7 +183,7 @@ GEM
     pg (1.2.2-x86-mingw32)
     polyamorous (2.3.2)
       activerecord (>= 5.2.1)
-    public_suffix (4.0.3)
+    public_suffix (5.0.0)
     puma (4.3.3)
       nio4r (~> 2.0)
     rack (2.2.2)