Gemfile.lock in nightcrawler_swift-0.7.0 vs Gemfile.lock in nightcrawler_swift-0.8.0

@@ -1,9 +1,10 @@
 PATH
   remote: .
   specs:
-    nightcrawler_swift (0.7.0)
+    nightcrawler_swift (0.8.0)
+      concurrent-ruby (~> 0.8.0)
       multi_mime (>= 1.0.1)
       rest-client
 
 GEM
   remote: https://rubygems.org/
@@ -13,17 +14,20 @@
       debugger-linecache (~> 1.2)
       slop (~> 3.6)
     codeclimate-test-reporter (0.4.0)
       simplecov (>= 0.7.1, < 1.0.0)
     columnize (0.9.0)
+    concurrent-ruby (0.8.0)
+      ref (~> 1.0, >= 1.0.5)
     debugger-linecache (1.2.0)
     diff-lcs (1.2.5)
     docile (1.1.5)
     mime-types (2.4.3)
     multi_json (1.10.1)
     multi_mime (1.0.1)
     netrc (0.10.2)
     rake (10.3.2)
+    ref (1.0.5)
     rest-client (1.7.2)
       mime-types (>= 1.16, < 3.0)
       netrc (~> 0.7)
     rspec (3.0.0)
       rspec-core (~> 3.0.0)