diff --git a/Gemfile.lock b/Gemfile.lock
index 284c8f55..2db3eb2f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,8 +2,8 @@ PATH
   remote: .
   specs:
     simple_form (3.0.0.beta1)
-      actionpack (>= 4.0.0.beta, < 4.1)
-      activemodel (>= 4.0.0.beta, < 4.1)
+      actionpack (>= 4.0.0.rc1, < 4.1)
+      activemodel (>= 4.0.0.rc1, < 4.1)
 
 GEM
   remote: https://rubygems.org/
diff --git a/simple_form.gemspec b/simple_form.gemspec
index be1f2da1..c268a064 100644
--- a/simple_form.gemspec
+++ b/simple_form.gemspec
@@ -20,6 +20,6 @@ Gem::Specification.new do |s|
 
   s.rubyforge_project = "simple_form"
 
-  s.add_dependency('activemodel', '>= 4.0.0.beta', '< 4.1')
-  s.add_dependency('actionpack', '>= 4.0.0.beta', '< 4.1')
+  s.add_dependency('activemodel', '>= 4.0.0.rc1', '< 4.1')
+  s.add_dependency('actionpack', '>= 4.0.0.rc1', '< 4.1')
 end