diff --git a/Gemfile.lock b/Gemfile.lock
index a08a7ed..8980ce0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -606,7 +606,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.5)
     connection_pool (2.2.1)
     crass (1.0.3)
     debug_inspector (0.0.3)
@@ -671,7 +671,7 @@ GEM
     public_suffix (3.0.2)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
-    rack (1.6.9)
+    rack (1.6.11)
     rack-mini-profiler (0.10.7)
       rack (>= 1.2.0)
     rack-protection (1.5.5)
@@ -782,7 +782,7 @@ GEM
       tilt (>= 1.3.3, < 2.1)
     spring (2.0.2)
       activesupport (>= 4.2)
-    sprockets (3.7.1)
+    sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.2.1)