diff --git a/2017/Gemfile.lock b/2017/Gemfile.lock
index 1040271..163bf4f 100644
--- a/2017/Gemfile.lock
+++ b/2017/Gemfile.lock
@@ -187,7 +187,7 @@ GEM
     thread_safe (0.3.6)
     typhoeus (0.8.0)
       ethon (>= 0.8.0)
-    tzinfo (1.2.2)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     unicode-display_width (1.1.3)