diff --git a/Gemfile.lock b/Gemfile.lock
index 79d899b2..365bc020 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    devise (3.5.3)
+    devise (4.0.0.pre.dev)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
       railties (>= 4.1.0, < 5.1)
@@ -140,8 +140,8 @@ GEM
     rake (10.4.2)
     rdoc (4.2.0)
       json (~> 1.4)
-    responders (2.1.0)
-      railties (>= 4.2.0, < 5)
+    responders (2.1.1)
+      railties (>= 4.2.0, < 5.1)
     ruby-openid (2.7.0)
     sprockets (3.5.2)
       concurrent-ruby (~> 1.0)
diff --git a/lib/devise/version.rb b/lib/devise/version.rb
index 80363a01..0e32a6a3 100644
--- a/lib/devise/version.rb
+++ b/lib/devise/version.rb
@@ -1,3 +1,3 @@
 module Devise
-  VERSION = "3.5.3".freeze
+  VERSION = "4.0.0-dev".freeze
 end