Gemfile.lock in imgkit-1.6.2 vs Gemfile.lock in imgkit-1.6.3

@@ -1,9 +1,9 @@
 PATH
   remote: .
   specs:
-    imgkit (1.6.1)
+    imgkit (1.6.2)
 
 GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.1.2)
@@ -16,11 +16,10 @@
       rspec-mocks (~> 2.6.0)
     rspec-core (2.6.4)
     rspec-expectations (2.6.0)
       diff-lcs (~> 1.1.2)
     rspec-mocks (2.6.0)
-    wkhtmltoimage-binary (0.12.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
@@ -28,9 +27,8 @@
   mocha
   rack (>= 1.6.11)
   rake
   rspec (~> 2)
   rspec-core (~> 2)
-  wkhtmltoimage-binary
 
 BUNDLED WITH
-   1.17.1
+   2.1.4