diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..ecd7ee5
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+2.5.8
diff --git a/.travis.yml b/.travis.yml
index 0d4aa83..0b09925 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: ruby
 
 rvm:
-  - 2.4.2
+  - 2.5.8
 
 gemfile:
   - Gemfile
diff --git a/Gemfile b/Gemfile
index 0683ec4..1b68594 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source "http://rubygems.org"
-ruby "2.4.2"
+ruby "2.5.8"
 
 gemspec
-gem 'nokogiri', '~> 1.8.1' # >= 1.7 is incompatible with Ruby 2.0
+gem 'nokogiri', '~> 1.10.10' # >= 1.7 is incompatible with Ruby 2.0
 gem 'codeclimate-test-reporter', group: :test, require: nil
diff --git a/fullcontact.gemspec b/fullcontact.gemspec
index ed185ab..8dda9df 100644
--- a/fullcontact.gemspec
+++ b/fullcontact.gemspec
@@ -12,7 +12,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'webmock', '~> 1.6'
   s.add_development_dependency 'yard', '~> 0.9.11'
   s.add_runtime_dependency 'hashie', ['>= 2.0', '< 4.0']
-  s.add_runtime_dependency 'faraday', '~> 0.14.0'
+  s.add_runtime_dependency 'faraday', '~> 0.17.3'
   s.add_runtime_dependency 'faraday_middleware', '>= 0.10'
 
   s.author = 'FullContact, Inc.'