use pry-byebug gem instead for pry (recommended for ruby 2.x)

Gemfile.lock

@@ -190,6 +190,9 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
       spoon (~> 0.0)
+    pry-byebug (3.3.0)
+      byebug (~> 8.0)
+      pry (~> 0.10)
     puma (2.15.3)
     puma (2.15.3-java)
     pundit (1.1.0)
@@ -324,6 +327,7 @@ GEM
       json (>= 1.8.0)
     unf (0.1.4)
       unf_ext
+    unf (0.1.4-java)
     unf_ext (0.0.7.1)
     unicode-display_width (0.3.1)
     web-console (2.3.0)
@@ -380,7 +384,7 @@ DEPENDENCIES
   nokogiri
   nyan-cat-formatter
   pg
-  pry
+  pry-byebug
   puma (~> 2.15.3)
   pundit
   rails (~> 4.1.13)
@@ -406,3 +410,6 @@ DEPENDENCIES
   uglifier (>= 1.3.0)
   web-console (~> 2.0)
   will_paginate (~> 3.0)
+
+BUNDLED WITH
+   1.12.4