diff --git a/Gemfile.lock b/Gemfile.lock
index 69b9560..4039ee8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,7 +33,7 @@ GEM
     erubis (2.7.0)
     eventmachine (1.2.7)
     execjs (2.7.0)
-    ffi (1.9.23)
+    ffi (1.15.5)
     haml (5.0.4)
       temple (>= 0.8.0)
       tilt
@@ -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