diff --git a/tdd_app/Gemfile.lock b/tdd_app/Gemfile.lock
index 514faf6..2d735ce 100644
--- a/tdd_app/Gemfile.lock
+++ b/tdd_app/Gemfile.lock
@@ -42,8 +42,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (9.0.0)
     bindex (0.8.1)
     bootsnap (1.4.4)
@@ -107,7 +107,7 @@ GEM
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
     pg (1.1.4)
-    public_suffix (3.1.1)
+    public_suffix (5.0.0)
     puma (3.12.1)
     rack (2.0.7)
     rack-test (1.1.0)