diff --git a/Gemfile.lock b/Gemfile.lock
index 3f04365..7f5fd86 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -70,8 +70,8 @@ GEM
       sprockets-sass (~> 1.0.0)
     mini_magick (3.6.0)
       subexec (~> 0.2.1)
-    multi_json (1.7.7)
-    rack (1.5.2)
+    multi_json (1.14.1)
+    rack (1.6.11)
     rack-livereload (0.3.15)
       rack
     rack-test (0.6.2)
@@ -83,7 +83,7 @@ GEM
       ffi (>= 0.5.0)
     redcarpet (3.0.0)
     sass (3.2.9)
-    sprockets (2.10.0)
+    sprockets (2.12.5)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)