Gemfile.lock in imgkit-1.5.0 vs Gemfile.lock in imgkit-1.6.0

@@ -1,47 +1,26 @@
 PATH
   remote: .
   specs:
-    imgkit (1.5.0)
+    imgkit (1.6.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    archive-tar-minitar (0.5.2)
-    columnize (0.3.4)
     diff-lcs (1.1.2)
-    linecache (0.46)
-      rbx-require-relative (> 0.0.4)
-    linecache19 (0.5.12)
-      ruby_core_source (>= 0.1.4)
     mocha (0.9.12)
     rack (1.3.0)
     rake (0.9.2.2)
-    rbx-require-relative (0.0.5)
     rspec (2.6.0)
       rspec-core (~> 2.6.0)
       rspec-expectations (~> 2.6.0)
       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)
-    ruby-debug (0.10.4)
-      columnize (>= 0.1)
-      ruby-debug-base (~> 0.10.4.0)
-    ruby-debug-base (0.10.4)
-      linecache (>= 0.3)
-    ruby-debug-base19 (0.11.25)
-      columnize (>= 0.3.1)
-      linecache19 (>= 0.5.11)
-      ruby_core_source (>= 0.1.4)
-    ruby-debug19 (0.11.6)
-      columnize (>= 0.3.1)
-      linecache19 (>= 0.5.11)
-      ruby-debug-base19 (>= 0.11.19)
-    ruby_core_source (0.1.5)
-      archive-tar-minitar (>= 0.5.2)
+    wkhtmltoimage-binary (0.12.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
@@ -49,7 +28,6 @@
   mocha
   rack
   rake
   rspec (~> 2)
   rspec-core (~> 2)
-  ruby-debug
-  ruby-debug19
+  wkhtmltoimage-binary