diff --git a/.travis.yml b/.travis.yml
index 8eaab14..fcd8aaa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,8 @@
 language: ruby
 
 rvm:
-  - 2.1
-  - 2.2
+  - 2.2.2
+  - 2.3
+  - 2.4
 
 script: bundle exec rake spec
diff --git a/omniauth-azure-activedirectory.gemspec b/omniauth-azure-activedirectory.gemspec
index 5fd46ad..9b82c3b 100644
--- a/omniauth-azure-activedirectory.gemspec
+++ b/omniauth-azure-activedirectory.gemspec
@@ -21,5 +21,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rspec', '~> 3.3'
   s.add_development_dependency 'rubocop', '~> 0.32'
   s.add_development_dependency 'simplecov', '~> 0.10'
-  s.add_development_dependency 'webmock', '~> 1.21'
+  s.add_development_dependency 'webmock', '~> 3.0.0'
 end