diff --git a/getting-started-with-ubuntu/Gemfile.lock b/getting-started-with-ubuntu/Gemfile.lock
index 22e2b61..04ef600 100644
--- a/getting-started-with-ubuntu/Gemfile.lock
+++ b/getting-started-with-ubuntu/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.7.0)
+    addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     bibtex-ruby (5.1.4)
       latex-decode (~> 0.0)
@@ -90,7 +90,7 @@ GEM
       sawyer (~> 0.8.0, >= 0.5.3)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.5)
+    public_suffix (4.0.6)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)