diff --git a/Gemfile.lock b/Gemfile.lock
index 15f535c..97c7be6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     codecov (0.5.2)
       simplecov (>= 0.15, < 0.22)
     crack (0.4.3)
@@ -15,7 +15,7 @@ GEM
     diff-lcs (1.3)
     docile (1.4.0)
     hashdiff (0.3.7)
-    public_suffix (3.0.2)
+    public_suffix (4.0.6)
     rake (13.0.1)
     rspec (3.7.0)
       rspec-core (~> 3.7.0)