diff --git a/demo/champsbook/Gemfile.lock b/demo/champsbook/Gemfile.lock
index 039330f..84f8fec 100644
--- a/demo/champsbook/Gemfile.lock
+++ b/demo/champsbook/Gemfile.lock
@@ -286,7 +286,7 @@ GEM
     thread_safe (0.3.6)
     typhoeus (1.3.1)
       ethon (>= 0.9.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     unicode-display_width (1.6.0)