diff --git a/Gemfile.lock b/Gemfile.lock
index ec893d0..6267449 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -74,7 +74,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.10.0)
-    concurrent-ruby (1.0.2)
+    concurrent-ruby (1.1.5)
     debug_inspector (0.0.2)
     devise (4.2.0)
       bcrypt (~> 3.0)
@@ -139,7 +139,7 @@ GEM
       activerecord (>= 3.0)
     pundit (1.1.0)
       activesupport (>= 3.0.0)
-    rack (1.6.4)
+    rack (1.6.11)
     rack-protection (1.5.3)
       rack
     rack-test (0.6.3)
@@ -199,7 +199,7 @@ GEM
       rack (~> 1.5)
       rack-protection (~> 1.4)
       tilt (>= 1.3, < 3)
-    sprockets (3.7.0)
+    sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.1.1)