diff --git a/Gemfile.lock b/Gemfile.lock
index 6a426a2..da8c573 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,8 +7,8 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
       zeitwerk (~> 2.1, >= 2.1.8)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     aws-eventstream (1.0.3)
     aws-partitions (1.200.0)
     aws-sdk-cloudformation (1.25.0)
@@ -63,7 +63,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.1.1)
+    public_suffix (4.0.6)
     regexp_parser (1.6.0)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)