diff --git a/Gemfile.lock b/Gemfile.lock
index 93ae07f..76957a6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -114,7 +114,7 @@ GEM
     mime-types-data (3.2016.0521)
     mini_portile2 (2.1.0)
     minitest (5.10.1)
-    multi_json (1.12.1)
+    multi_json (1.15.0)
     nenv (0.2.0)
     nokogiri (1.7.1)
       mini_portile2 (~> 2.1.0)
@@ -127,7 +127,7 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     puma (2.15.3)
-    rack (1.6.5)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.8)
@@ -204,7 +204,7 @@ GEM
       activesupport (>= 4.2)
     spring-commands-rspec (1.0.4)
       spring (>= 0.9.1)
-    sprockets (2.12.4)
+    sprockets (2.12.5)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)