diff --git a/Gemfile.lock b/Gemfile.lock
index d93c70b..4338b30 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -267,7 +267,7 @@ GEM
     mime-types-data (3.2016.0521)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
-    multi_json (1.13.1)
+    multi_json (1.15.0)
     netrc (0.11.0)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
@@ -279,7 +279,7 @@ GEM
       tilt (>= 1.4.1, < 3)
     padrino-support (0.12.9)
       activesupport (>= 3.1)
-    rack (1.6.10)
+    rack (1.6.13)
     rack-livereload (0.3.17)
       rack
     rack-test (1.0.0)
@@ -304,7 +304,7 @@ GEM
     slim (3.0.9)
       temple (>= 0.7.6, < 0.9)
       tilt (>= 1.3.3, < 2.1)
-    sprockets (2.12.4)
+    sprockets (2.12.5)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)