diff --git a/administrate-field-belongs_to_search.gemspec b/administrate-field-belongs_to_search.gemspec
index 89a85d1..b14a98e 100755
--- a/administrate-field-belongs_to_search.gemspec
+++ b/administrate-field-belongs_to_search.gemspec
@@ -16,7 +16,7 @@ Gem::Specification.new do |gem|
   gem.files = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(spec)/}) }
   gem.test_files = `git ls-files -z -- {spec}/*`.split("\x0")
 
-  gem.add_dependency 'administrate', '>= 0.3', '< 0.6'
+  gem.add_dependency 'administrate', '>= 0.3', '< 0.7'
   gem.add_dependency 'rails', '>= 4.2', '< 5.1'
   gem.add_dependency 'selectize-rails', '~> 0.6'