diff --git a/Gemfile.lock b/Gemfile.lock
index 1c2a399..4f678d8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -62,7 +62,7 @@ GEM
       json (>= 1.7)
       mime-types (>= 1.16)
     cliver (0.3.2)
-    concurrent-ruby (1.0.2)
+    concurrent-ruby (1.1.5)
     database_cleaner (1.7.0)
     debug_inspector (0.0.2)
     diff-lcs (1.3)
@@ -125,7 +125,7 @@ GEM
     puma (3.5.2)
     quiet_assets (1.0.3)
       railties (>= 3.1, < 5.0)
-    rack (1.6.4)
+    rack (1.6.11)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.6)
@@ -193,7 +193,7 @@ GEM
       json (~> 1.7, >= 1.7.7)
       rdoc (~> 4.0)
     spring (1.7.2)
-    sprockets (3.7.0)
+    sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.1.1)