diff --git a/Gemfile.lock b/Gemfile.lock
index b693696..44cd2b8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,8 +16,8 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     backports (3.17.1)
     browserstack-local (1.3.0)
     builder (3.2.4)
@@ -57,7 +57,7 @@ GEM
     mustermann (1.0.3)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
-    public_suffix (4.0.4)
+    public_suffix (5.0.0)
     quke_demo_app (0.2.0)
       sinatra (~> 2.0.2)
       thor