diff --git a/Gemfile.lock b/Gemfile.lock
index 69b9560..2d636d5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -90,7 +90,7 @@ GEM
       sprockets-helpers (~> 1.1.0)
       sprockets-sass (~> 1.3.0)
     minitest (5.11.3)
-    multi_json (1.13.1)
+    multi_json (1.15.0)
     net-sftp (2.1.2)
       net-ssh (>= 2.6.5)
     net-ssh (4.2.0)
@@ -102,7 +102,7 @@ GEM
       activesupport (>= 3.1)
     pdfkit (0.8.2)
     ptools (1.3.5)
-    rack (1.6.9)
+    rack (1.6.13)
     rack-livereload (0.3.17)
       rack
     rack-test (0.6.3)
@@ -112,7 +112,7 @@ GEM
       ffi (>= 0.5.0, < 2)
     ref (2.0.0)
     sass (3.4.25)
-    sprockets (2.12.4)
+    sprockets (2.12.5)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)
@@ -137,20 +137,22 @@ GEM
     uglifier (2.7.2)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
-    wkhtmltopdf_binary_provider (0.12.0)
+    wkhtmltopdf-binary (0.12.6.5)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  execjs
   less (~> 2.6.0)
   maruku (~> 0.7.2)
   middleman (~> 3.3.3)
   middleman-deploy (~> 0.2.4)
   middleman-livereload (~> 3.4.6)
   pdfkit (~> 0.8.2)
+  rb-inotify (~> 0.9)
   therubyracer
-  wkhtmltopdf_binary_provider (~> 0.12.0)
+  wkhtmltopdf-binary (~> 0.12.5)
 
 BUNDLED WITH
    1.16.1