diff --git a/Gemfile.lock b/Gemfile.lock
index b9a5eaa..dd33119 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,7 +42,7 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.7.0)
+    addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     archive-zip (0.12.0)
       io-like (~> 0.3.0)
@@ -106,7 +106,7 @@ GEM
     passenger (6.0.4)
       rack
       rake (>= 0.8.1)
-    public_suffix (4.0.3)
+    public_suffix (4.0.6)
     puma (3.12.2)
     rack (2.2.1)
     rack-test (1.1.0)
@@ -203,7 +203,6 @@ DEPENDENCIES
   selenium-webdriver
   sqlite3
   turbolinks (~> 5)
-  tzinfo-data
   uglifier (>= 1.3.0)
   web-console (>= 3.3.0)