diff --git a/.rubocop.yml b/.rubocop.yml
index adad792..e5c8df6 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,3 +1,5 @@
+inherit_from: .rubocop_todo.yml
+
 require: rubocop-jekyll
 inherit_gem:
   rubocop-jekyll: .rubocop.yml
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 0000000..8d8b2c8
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,13 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2019-03-25 11:42:06 +0100 using RuboCop version 0.66.0.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Lint/ToJSON:
+  Exclude:
+    - 'lib/jekyll-seo-tag/json_ld_drop.rb'
diff --git a/.travis.yml b/.travis.yml
index 4c96096..69a0c96 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,18 @@
-rvm:
-  - 2.3
-  - 2.4
-  - 2.5
-before_install: gem install bundler
 language: ruby
-script: script/cibuild
-sudo: false
 cache: bundler
+rvm:
+  - 2.4
+  - 2.6
+
+before_install:
+  - gem update --system
+  - gem install bundler
+
+script: script/cibuild
 
 env:
   global:
     - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
+  matrix:
+    - JEKYLL_VERSION="~> 3.3"
+    - JEKYLL_VERSION=">= 4.0.0.pre.alpha1"
diff --git a/Gemfile b/Gemfile
index 83c46ca..a1ebfdb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,4 +4,4 @@ source "https://rubygems.org"
 
 gemspec
 
-gem "github-pages", :group => :jekyll_plugins
+gem "jekyll", ENV["JEKYLL_VERSION"] if ENV["JEKYLL_VERSION"]
diff --git a/History.markdown b/History.markdown
index ae17192..4252067 100644
--- a/History.markdown
+++ b/History.markdown
@@ -1,16 +1,42 @@
 ## HEAD
 
+### Documentation
+
+  * HTTPS links to schema.org (#350)
+  * use example.com for example URL (#351)
+  * remove Google+ from example snippet (#358)
+  * HTTPS link to https://ogp.me/ (#359)
+
+## 2.6.1 / 2019-05-17
+
+### Development Fixes
+
+  * Test against Jekyll 4.x (#336)
+
+## 2.6.0 / 2019-03-16
+
+### Minor Enhancements
+
+  * Twitter Image and Title (#330)
+
 ### Bug Fixes
 
+  * Do not cache the drop payload for SeoTag (#306)
   * Update url of schema website (#296)
 
 ### Development Fixes
 
-  * Lint Ruby code with rubocop-jekyll gem (#302)
-  * deps: bump rubocop-jekyll to 0.3.0 (#316)
-  * Correct RuboCop offenses in spec files (#319)
-  * chore(deps): :up: rubocop-jekyll 0.4 (#320)
   * Relax version constraint on Bundler (#325)
+  * chore(ci): Add Ruby 2.6, drop Ruby 2.3 (#326)
+  * chore (ci): remove deprecated `sudo: false` in .travis.yml (#333)
+  * Lint Ruby code with rubocop-jekyll gem (#302)
+  * chore(deps): bump rubocop-jekyll to v0.4 (#320)
+  * chore(deps): bump rubocop-jekyll to v0.3 (#316)
+  * Correct RuboCop offenses in spec files (#319)
+
+### Documentation
+
+  * Rectify error in Usage documentation (#328)
 
 ## 2.5.0 / 2018-05-18
 
diff --git a/docs/README.md b/docs/README.md
index a168de8..9a9557d 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -12,8 +12,8 @@ Jekyll SEO Tag adds the following meta tags to your site:
 * Page description
 * Canonical URL
 * Next and previous URLs on paginated pages
-* [JSON-LD Site and post metadata](https://developers.google.com/structured-data/) for richer indexing
-* [Open Graph](http://ogp.me/) title, description, site title, and URL (for Facebook, LinkedIn, etc.)
+* [JSON-LD Site and post metadata](https://developers.google.com/search/docs/guides/intro-structured-data) for richer indexing
+* [Open Graph](https://ogp.me/) title, description, site title, and URL (for Facebook, LinkedIn, etc.)
 * [Twitter Summary Card](https://dev.twitter.com/cards/overview) metadata
 
 While you could theoretically add the necessary metadata tags yourself, Jekyll SEO Tag provides a battle-tested template of crowdsourced best-practices.
diff --git a/docs/advanced-usage.md b/docs/advanced-usage.md
index e93554f..985c494 100644
--- a/docs/advanced-usage.md
+++ b/docs/advanced-usage.md
@@ -74,8 +74,10 @@ The following options can be set for any particular page. While the default opti
 
 * `seo`
   * `name` - If the name of the thing that the page represents is different from the page title. (i.e.: "Frank's Café" vs "Welcome to Frank's Café")
-  * `type` - The type of things that the page represents. This must be a [Schema.org type](http://schema.org/docs/schemas.html), and will probably usually be something like [`BlogPosting`](http://schema.org/BlogPosting), [`NewsArticle`](http://schema.org/NewsArticle), [`Person`](http://schema.org/Person), [`Organization`](http://schema.org/Organization), etc.
+  * `type` - The type of things that the page represents. This must be a [Schema.org type](https://schema.org/docs/schemas.html), and will probably usually be something like [`BlogPosting`](https://schema.org/BlogPosting), [`NewsArticle`](https://schema.org/NewsArticle), [`Person`](https://schema.org/Person), [`Organization`](https://schema.org/Organization), etc.
   * `links` - An array of other URLs that represent the same thing that this page represents. For instance, Jane's bio page might include links to Jane's GitHub and Twitter profiles.
+  * `date_modified` - Manually specify the `dateModified` field in the JSON-LD output to override Jekyll's own `dateModified`.
+  This field will take **first priority** for the `dateModified` JSON-LD output. This is useful when the file timestamp does not match the true time that the content was modified. A user may also install [Last Modified At](https://github.com/gjtorikian/jekyll-last-modified-at) which will offer an alternative way of providing for the `dateModified` field.
 
 ### Customizing image output
 
@@ -136,7 +138,7 @@ title: Title of Your Post
 
 Which will generate following canonical_url:
 ```html
-<link rel="canonical" href="http://yoursite.com/title-of-your-post" />
+<link rel="canonical" href="https://example.com/title-of-your-post" />
 ```
 
 ### Customizing title modifier for paginated pages
diff --git a/docs/usage.md b/docs/usage.md
index c966ae8..38ae530 100644
--- a/docs/usage.md
+++ b/docs/usage.md
@@ -35,7 +35,6 @@ The SEO tag will respect any of the following if included in your site's `_confi
 * `social` - For [specifying social profiles](https://developers.google.com/structured-data/customize/social-profiles). The following properties are available:
   * `name` - If the user or organization name differs from the site's name
   * `links` - An array of links to social media profiles.
-  * `date_modified` - Manually specify the `dateModified` field in the JSON-LD output to override Jekyll's own `dateModified`. This field will take **first priority** for the `dateModified` JSON-LD output. This is useful when the file timestamp does not match the true time that the content was modified. A user may also install [Last Modified At](https://github.com/gjtorikian/jekyll-last-modified-at) which will offer an alternative way of providing for the `dateModified` field.
 
   ```yml
   social:
@@ -44,7 +43,6 @@ The SEO tag will respect any of the following if included in your site's `_confi
       - https://twitter.com/BenBalter
       - https://www.facebook.com/ben.balter
       - https://www.linkedin.com/in/BenBalter
-      - https://plus.google.com/+BenBalter
       - https://github.com/benbalter
       - https://keybase.io/benbalter
   ```
diff --git a/jekyll-seo-tag.gemspec b/jekyll-seo-tag.gemspec
index 31d92aa..23ccce1 100644
--- a/jekyll-seo-tag.gemspec
+++ b/jekyll-seo-tag.gemspec
@@ -28,7 +28,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r!^exe/!) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "jekyll", "~> 3.3"
+  spec.add_dependency "jekyll", ">= 3.3", "< 5.0"
   spec.add_development_dependency "bundler", ">= 1.15"
   spec.add_development_dependency "html-proofer", "~> 3.7"
   spec.add_development_dependency "rspec", "~> 3.5"
diff --git a/lib/jekyll-seo-tag.rb b/lib/jekyll-seo-tag.rb
index 933fc53..589fd13 100644
--- a/lib/jekyll-seo-tag.rb
+++ b/lib/jekyll-seo-tag.rb
@@ -56,7 +56,11 @@ module Jekyll
     end
 
     def drop
-      @drop ||= Jekyll::SeoTag::Drop.new(@text, @context)
+      if context.registers[:site].liquid_renderer.respond_to?(:cache)
+        Jekyll::SeoTag::Drop.new(@text, @context)
+      else
+        @drop ||= Jekyll::SeoTag::Drop.new(@text, @context)
+      end
     end
 
     def info
diff --git a/lib/jekyll-seo-tag/version.rb b/lib/jekyll-seo-tag/version.rb
index 3fe158c..3a3808f 100644
--- a/lib/jekyll-seo-tag/version.rb
+++ b/lib/jekyll-seo-tag/version.rb
@@ -5,6 +5,6 @@ module Liquid; class Tag; end; end
 
 module Jekyll
   class SeoTag < Liquid::Tag
-    VERSION = "2.5.0"
+    VERSION = "2.6.1"
   end
 end
diff --git a/lib/template.html b/lib/template.html
index c2dffef..6422141 100755
--- a/lib/template.html
+++ b/lib/template.html
@@ -54,10 +54,12 @@
 {% if site.twitter %}
   {% if seo_tag.image %}
     <meta name="twitter:card" content="{{ page.twitter.card | default: site.twitter.card | default: "summary_large_image" }}" />
+    <meta property="twitter:image" content="{{ seo_tag.image.path }}" />
   {% else %}
     <meta name="twitter:card" content="summary" />
   {% endif %}
 
+  <meta property="twitter:title" content="{{ seo_tag.page_title }}" />
   <meta name="twitter:site" content="@{{ site.twitter.username | replace:"@","" }}" />
 
   {% if seo_tag.author.twitter %}