diff --git a/Gemfile.lock b/Gemfile.lock
index 32cb641..f940005 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -40,7 +40,7 @@ GEM
       uber (~> 0.0.4)
     i18n (0.7.0)
     json (1.8.3)
-    kramdown (1.7.0)
+    kramdown (1.8.0)
     listen (2.10.1)
       celluloid (~> 0.16.0)
       rb-fsevent (>= 0.9.3)
@@ -82,7 +82,7 @@ GEM
       middleman-core (~> 3.2)
       rouge (~> 1.0)
     minitest (5.7.0)
-    multi_json (1.11.1)
+    multi_json (1.11.2)
     padrino-helpers (0.12.5)
       i18n (~> 0.6, >= 0.6.7)
       padrino-support (= 0.12.5)
@@ -98,8 +98,8 @@ GEM
       ffi (>= 0.5.0)
     redcarpet (3.3.2)
     rouge (1.9.1)
-    sass (3.4.14)
-    sprockets (2.12.3)
+    sass (3.4.16)
+    sprockets (2.12.4)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)