diff --git a/administrate-field-enum.gemspec b/administrate-field-enum.gemspec
index 33289e9..dac2f00 100755
--- a/administrate-field-enum.gemspec
+++ b/administrate-field-enum.gemspec
@@ -14,5 +14,5 @@ Gem::Specification.new do |s|
   s.files = `git ls-files`.split("\n")
   s.test_files = `git ls-files -- {test,spec,features}/*`.split("\n")
 
-  s.add_dependency 'administrate', '~> 0.12'
+  s.add_dependency 'administrate', '~> 0.12, < 2.0'
 end