Gemfile.lock in lightio-0.1.0.pre vs Gemfile.lock in lightio-0.1.0

@@ -1,9 +1,9 @@
 PATH
   remote: .
   specs:
     lightio (0.1.0.pre)
-      nio4r
+      nio4r (~> 2.1)
 
 GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.3)