diff --git a/Gemfile.lock b/Gemfile.lock
index 4f56195..e8eb79c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -45,7 +45,7 @@ GEM
       sass (>= 3.3.0, < 3.5)
     compass-import-once (1.0.5)
       sass (>= 3.2, < 3.5)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.5)
     crass (1.0.2)
     daemons (1.2.5)
     dragonfly (1.1.3)
@@ -149,7 +149,7 @@ GEM
     pony (1.11)
       mail (>= 2.0)
     public_suffix (3.0.0)
-    rack (2.0.3)
+    rack (2.0.7)
     rack-cache (1.7.1)
       rack (>= 0.4)
     rack-livereload (0.3.16)
@@ -168,7 +168,7 @@ GEM
       nokogiri (>= 1.4.4)
       nokogumbo (~> 1.4.1)
     sass (3.4.25)
-    sprockets (3.7.1)
+    sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sshkit (1.14.0)