diff --git a/play-with-docker/Portus/Gemfile.lock b/play-with-docker/Portus/Gemfile.lock
index cf67c0993..5b5ce09c2 100644
--- a/play-with-docker/Portus/Gemfile.lock
+++ b/play-with-docker/Portus/Gemfile.lock
@@ -83,6 +83,7 @@ GEM
       simplecov (>= 0.7.1, < 1.0.0)
     coderay (1.1.0)
     columnize (0.9.0)
+    concurrent-ruby (1.1.10)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     crono (0.9.0)
@@ -153,7 +154,8 @@ GEM
     highline (1.7.8)
     hike (1.2.3)
     hirb (0.7.3)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     json (1.8.6)
     json-schema (2.5.1)
       addressable (~> 2.3.7)