diff --git a/administrate-field-nested_has_many.gemspec b/administrate-field-nested_has_many.gemspec
index 4d00fdf..d18b4a0 100644
--- a/administrate-field-nested_has_many.gemspec
+++ b/administrate-field-nested_has_many.gemspec
@@ -1,10 +1,8 @@
 $:.push File.expand_path("../lib", __FILE__)
 
-require "administrate/field/nested_has_many"
-
 Gem::Specification.new do |gem|
   gem.name = "administrate-field-nested_has_many"
-  gem.version = Administrate::Field::NestedHasMany::VERSION
+  gem.version = "0.1.0"
   gem.authors = ["Grayson Wright"]
   gem.email = ["wright.grayson@gmail.com"]
   gem.homepage = "https://github.com/graysonwright/administrate-field-nested_has_many"
@@ -16,7 +14,9 @@ Gem::Specification.new do |gem|
   gem.files = `git ls-files`.split("\n")
   gem.test_files = `git ls-files -- {test,spec,features}/*`.split("\n")
 
-  gem.add_dependency "administrate", "~> 0.2.1"
-  gem.add_dependency "cocoon", "~> 1.2"
-  gem.add_dependency "rails", "~> 4.2"
+  gem.add_development_dependency "bundler", ">= 2.2.33"
+  gem.add_development_dependency "rake", ">= 12.3.3"
+  gem.add_dependency "administrate", ">= 0.2.1"
+  gem.add_dependency "cocoon", ">= 1.2"
+  gem.add_dependency "rails", ">= 6.0"
 end