diff --git a/play-with-docker/Portus/Gemfile.lock b/play-with-docker/Portus/Gemfile.lock
index c1235180e..04a5bfe3f 100644
--- a/play-with-docker/Portus/Gemfile.lock
+++ b/play-with-docker/Portus/Gemfile.lock
@@ -354,7 +354,7 @@ GEM
       polyglot (~> 0.3)
     typhoeus (1.0.2)
       ethon (>= 0.9.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (2.7.2)
       execjs (>= 0.3.0)