diff --git a/.travis.yml b/.travis.yml
index 3a283a1..369fbb4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,14 +4,25 @@ sudo: false
 
 matrix:
   include:
+    - rvm: 2.6.1
+    - rvm: 2.6.0
+    - rvm: 2.5.3
+    - rvm: 2.5.2
+    - rvm: 2.5.1
+    - rvm: 2.5.0
+    - rvm: 2.4.4
+    - rvm: 2.4.3
+    - rvm: 2.4.2
     - rvm: 2.4.1
     - rvm: 2.4.1
       script:
         - bundle exec danger
+    - rvm: 2.3.6
+    - rvm: 2.3.5
+    - rvm: 2.3.4
+    - rvm: 2.2.7
     - rvm: jruby-9.1.12.0
     - rvm: jruby-head
-    - rvm: 2.2.7
-    - rvm: 2.3.4
     - rvm: rbx-2
     - rvm: ruby-head
   allow_failures:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d592dc8..42dc6ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ### 0.9.1 (Next)
 
+This version is no longer tested with Ruby < 2.2.
+
+* [#105](https://github.com/codegram/hyperclient/pull/105): Added Danger, PR linter - [@dblock](https://github.com/dblock).
+* [#104](https://github.com/codegram/hyperclient/pull/104): fix #to_h and #to_hash on Hyperclient::Resource - [@jufemaiz](https://github.com/jufemaiz)
 * Your contribution here.
 
 ### 0.9.0 (January 10, 2018)
diff --git a/test/hyperclient/collection_test.rb b/test/hyperclient/collection_test.rb
index fe9b58d..adc0b34 100644
--- a/test/hyperclient/collection_test.rb
+++ b/test/hyperclient/collection_test.rb
@@ -41,6 +41,12 @@ module Hyperclient
       end
     end
 
+    describe '#to_h' do
+      it 'returns the wrapped collection as a hash' do
+        collection.to_h.must_be_kind_of Hash
+      end
+    end
+
     describe 'include?' do
       it 'returns true for keys that exist' do
         collection.include?('_links').must_equal true
diff --git a/test/hyperclient/resource_test.rb b/test/hyperclient/resource_test.rb
index 18c0cc6..92ed0ae 100644
--- a/test/hyperclient/resource_test.rb
+++ b/test/hyperclient/resource_test.rb
@@ -108,6 +108,18 @@ module Hyperclient
           resource['foo'].must_equal 'bar'
         end
 
+        describe '#to_h' do
+          it 'returns the resource attributes as a hash' do
+            resource.to_h.must_be_kind_of Hash
+          end
+        end
+
+        describe '#to_hash' do
+          it 'returns the resource attributes as a hash' do
+            resource.to_hash.must_be_kind_of Hash
+          end
+        end
+
         describe '#fetch' do
           it 'returns the value for keys that exist' do
             resource._attributes.expects(:foo).returns('bar')