diff --git a/Gemfile.lock b/Gemfile.lock
index beaa66d..3c79a93 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,6 +7,7 @@ GEM
     attr_required (0.0.5)
     backports (3.1.1)
     coderay (1.0.9)
+    concurrent-ruby (1.1.10)
     eventmachine (1.0.3)
     faraday (0.8.7)
       multipart-post (~> 1.1)
@@ -67,7 +68,8 @@ GEM
       tilt (~> 1.3)
     slop (3.4.4)
     tilt (1.3.6)
-    tzinfo (0.3.37)
+    tzinfo (2.0.5)
+      concurrent-ruby (~> 1.0)
 
 PLATFORMS
   ruby