diff --git a/lib/github-pages/dependencies.rb b/lib/github-pages/dependencies.rb
index 8a82d38..860b0ff 100644
--- a/lib/github-pages/dependencies.rb
+++ b/lib/github-pages/dependencies.rb
@@ -15,37 +15,30 @@ module GitHubPages
       "jekyll-commonmark-ghpages" => "0.1.6",
 
       # Misc
-      "liquid" => "4.0.0",
-      "rouge" => "3.11.0",
+      "liquid" => "4.0.3",
+      "rouge" => "3.13.0",
       "github-pages-health-check" => "1.16.1",
 
       # Plugins
-      "jekyll-redirect-from" => "0.14.0",
-      "jekyll-sitemap" => "1.2.0",
-      "jekyll-feed" => "0.11.0",
+      "jekyll-redirect-from" => "0.15.0",
+      "jekyll-sitemap" => "1.4.0",
+      "jekyll-feed" => "0.13.0",
       "jekyll-gist" => "1.5.0",
       "jekyll-paginate" => "1.1.0",
       "jekyll-coffeescript" => "1.1.1",
-      "jekyll-seo-tag" => "2.5.0",
+      "jekyll-seo-tag" => "2.6.1",
       "jekyll-github-metadata" => "2.12.1",
-      "jekyll-avatar" => "0.6.0",
-      "jekyll-remote-theme" => "0.4.0",
+      "jekyll-avatar" => "0.7.0",
+      "jekyll-remote-theme" => "0.4.1",
 
       # Plugins to match GitHub.com Markdown
-      "jemoji" => "0.10.2",
-      "jekyll-mentions" => "1.4.1",
-      "jekyll-relative-links" => "0.6.0",
-      "jekyll-optional-front-matter" => "0.3.0",
-      "jekyll-readme-index" => "0.2.0",
+      "jemoji" => "0.11.1",
+      "jekyll-mentions" => "1.5.1",
+      "jekyll-relative-links" => "0.6.1",
+      "jekyll-optional-front-matter" => "0.3.2",
+      "jekyll-readme-index" => "0.3.0",
       "jekyll-default-layout" => "0.1.4",
-      "jekyll-titles-from-headings" => "0.5.1",
-
-      # Pin listen because it's broken on 2.1 & that's what we recommend.
-      # https://github.com/guard/listen/pull/371
-      "listen" => "3.1.5",
-
-      # Pin activesupport because 5.0 is broken on 2.1
-      "activesupport" => "4.2.11.1",
+      "jekyll-titles-from-headings" => "0.5.3",
     }.freeze
 
     # Jekyll and related dependency versions as used by GitHub Pages.
diff --git a/lib/github-pages/plugins.rb b/lib/github-pages/plugins.rb
index 237bde7..de4af62 100644
--- a/lib/github-pages/plugins.rb
+++ b/lib/github-pages/plugins.rb
@@ -48,9 +48,9 @@ module GitHubPages
 
     # Themes
     THEMES = {
-      "jekyll-swiss" => "0.4.0",
-      "minima" => "2.5.0",
-      "jekyll-theme-primer" => "0.5.3",
+      "jekyll-swiss" => "1.0.0",
+      "minima" => "2.5.1",
+      "jekyll-theme-primer" => "0.5.4",
       "jekyll-theme-architect" => "0.1.1",
       "jekyll-theme-cayman" => "0.1.1",
       "jekyll-theme-dinky" => "0.1.1",
diff --git a/spec/github-pages/dependencies_spec.rb b/spec/github-pages/dependencies_spec.rb
index ceb31f3..1e592eb 100644
--- a/spec/github-pages/dependencies_spec.rb
+++ b/spec/github-pages/dependencies_spec.rb
@@ -5,7 +5,7 @@ require "spec_helper"
 describe(GitHubPages::Dependencies) do
   CORE_DEPENDENCIES = %w(
     jekyll kramdown liquid rouge jekyll-sass-converter
-    github-pages-health-check listen activesupport
+    github-pages-health-check
   ).freeze
   PLUGINS = described_class::VERSIONS.keys - CORE_DEPENDENCIES
 
diff --git a/spec/github-pages/integration_spec.rb b/spec/github-pages/integration_spec.rb
index c8d1dfa..d2a9dd3 100644
--- a/spec/github-pages/integration_spec.rb
+++ b/spec/github-pages/integration_spec.rb
@@ -69,7 +69,7 @@ RSpec.describe "Pages Gem Integration spec" do
       contents = File.read(__FILE__)
       contexts = contents.scan(/context \"(.*?)\"/)
       missing = GitHubPages::Dependencies::VERSIONS.keys - contexts.flatten
-      missing -= %w(listen activesupport github-pages-health-check)
+      missing -= %w(github-pages-health-check)
       msg = "The following dependencies are missing integration tests: #{missing.join(", ")}"
       expect(missing).to be_empty, msg
     end