diff --git a/Gemfile.lock b/Gemfile.lock
index e59a041..15305e4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,8 +11,8 @@ 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)
     awesome_print (1.8.0)
     bundler-audit (0.6.0)
       bundler (~> 1.2)
@@ -24,7 +24,7 @@ GEM
     mini_portile2 (2.4.0)
     nokogiri (1.10.3)
       mini_portile2 (~> 2.4.0)
-    public_suffix (3.0.2)
+    public_suffix (4.0.6)
     rake (12.3.0)
     rgeo (2.0.1)
     rgeo-proj4 (2.0.0)