diff --git a/Gemfile.lock b/Gemfile.lock
index 2a3e248..6ccd2ff 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -111,7 +111,7 @@ GEM
       libv8 (~> 3.16.14.0)
       ref
     thor (0.19.1)
-    thread_safe (0.3.4)
+    thread_safe (0.3.6)
     tilt (1.4.1)
     treetop (1.4.15)
       polyglot
@@ -123,7 +123,7 @@ GEM
       execjs (~> 2.2)
       rails (~> 4.1)
       railties (~> 4.1)
-    tzinfo (1.2.2)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (2.5.3)
       execjs (>= 0.3.0)