Gemfile.lock in rbrsync-0.0.4 vs Gemfile.lock in rbrsync-0.0.5

@@ -1,15 +1,15 @@
 PATH
   remote: .
   specs:
-    rbrsync (1.0.0)
-      open4 (= 1.3.0)
+    rbrsync (0.0.4)
+      posix-spawn (~> 0.3.6)
 
 GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.2.2)
-    open4 (1.3.0)
+    posix-spawn (0.3.6)
     rspec (2.13.0)
       rspec-core (~> 2.13.0)
       rspec-expectations (~> 2.13.0)
       rspec-mocks (~> 2.13.0)
     rspec-core (2.13.1)