diff --git a/examples/user-guide/Gemfile.lock b/examples/user-guide/Gemfile.lock
index e13414c3..871c6490 100644
--- a/examples/user-guide/Gemfile.lock
+++ b/examples/user-guide/Gemfile.lock
@@ -6,7 +6,7 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.7.0)
+    addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     bibtex-ruby (4.4.7)
       latex-decode (~> 0.0)