diff --git a/zabbixapi.gemspec b/zabbixapi.gemspec
index 9107be9..9520de8 100644
--- a/zabbixapi.gemspec
+++ b/zabbixapi.gemspec
@@ -9,7 +9,7 @@ require 'zabbixapi/version'
 Gem::Specification.new do |spec|
   spec.add_dependency 'http', '~> 2.0'
   spec.add_dependency 'json', '~> 2.0'
-  spec.add_development_dependency 'bundler', '~> 1.0'
+  spec.add_development_dependency 'bundler'
 
   spec.name        = 'zabbixapi'
   spec.version     = ZabbixApi::VERSION