./Gemfile.lock in rack-subdomain-0.3.0 vs ./Gemfile.lock in rack-subdomain-0.3.1

@@ -1,13 +1,15 @@
 PATH
   remote: .
   specs:
-    rack-subdomain (0.3.0)
+    rack-subdomain (0.3.1)
+      ipaddress (~> 0.8.0)
       rack (>= 1.2.0, <= 2.0.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
+    ipaddress (0.8.0)
     minitest (2.11.4)
     rack (1.4.1)
     rack-test (0.6.1)
       rack (>= 1.0)
     rake (0.9.2.2)