diff --git a/Gemfile b/Gemfile
index 6e58404..7ed29cd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 gem 'jruby-openssl', platforms: :jruby
-gem 'rake', '~> 11.1'
+gem 'rake', '~> 13.0'
 gem 'yard', '>= 0.9'
 
 group :development do
diff --git a/zabbixapi.gemspec b/zabbixapi.gemspec
index 9520de8..40e92e1 100644
--- a/zabbixapi.gemspec
+++ b/zabbixapi.gemspec
@@ -7,8 +7,8 @@ $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'zabbixapi/version'
 
 Gem::Specification.new do |spec|
-  spec.add_dependency 'http', '~> 2.0'
-  spec.add_dependency 'json', '~> 2.0'
+  spec.add_dependency 'http', '~> 5.0'
+  spec.add_dependency 'json', '~> 2.6'
   spec.add_development_dependency 'bundler'
 
   spec.name        = 'zabbixapi'