diff --git a/docs-requirements.txt b/docs-requirements.txt
index eb31ad97af10..683fae150f93 100644
--- a/docs-requirements.txt
+++ b/docs-requirements.txt
@@ -1,3 +1,3 @@
-sphinx>=3.0
-furo==2021.09.08
+sphinx >=4.0.0
+furo ==2022.06.04.1
 recommonmark>=0.5.0
diff --git a/docs/_static/styles/custom.css b/docs/_static/styles/custom.css
index c18c5bf39333..438085d4f1aa 100644
--- a/docs/_static/styles/custom.css
+++ b/docs/_static/styles/custom.css
@@ -40,6 +40,35 @@ html {
   font-size: 100% !important;
 }
 
+h1, h2 {
+  margin-top: 1.5rem;
+  margin-bottom: 0.75rem;
+  font-weight: 300;
+}
+h3, h4, h5, h6 {
+  margin-top: 1.5rem;
+  margin-bottom: 0.5rem;
+  font-weight: 400;
+}
+h1 {
+  font-size: 2.25rem;
+}
+h2 {
+  font-size: 1.75rem;
+}
+h3 {
+  font-size: 1.25rem;
+}
+h4 {
+  font-size: 1rem;
+}
+h5 {
+  font-size: 0.875rem;
+}
+h6 {
+  font-size: 0.75rem;
+}
+
 code.literal {
   font-size: var(--font-size--small);
 }
@@ -56,14 +85,18 @@ strong.command {
   font: normal var(--font-size--small) var(--font-stack--monospace);
 }
 
-a[href^="http://"],
-a[href^="https://"]:not([href^="https://billy2011.github.io/streamlink-27/"]) {
+.highlight .go {
+  font-style: normal;
+}
+
+a[href^="http://"]:not(.muted-link),
+a[href^="https://"]:not(.muted-link):not([href^="https://billy2011.github.io/streamlink-27/"]) {
   display: inline-block;
   word-break: break-word;
 }
 
-a[href^="http://"],
-a[href^="https://"]:not([href^="https://billy2011.github.io/streamlink-27/"])::after {
+a[href^="http://"]:not(.no-external-link-icon):not(.muted-link)::after,
+a[href^="https://"]:not(.no-external-link-icon):not(.muted-link):not([href^="https://billy2011.github.io/streamlink-27/"])::after {
   content: "\f35d";
   display: inline-block;
   padding-left: .4em;
@@ -133,7 +166,7 @@ a[href^="https://"]:not([href^="https://billy2011.github.io/streamlink-27/"])::a
 }
 .sidebar-versions-others dd {
   width: 50%;
-  margin: 0;
+  margin: 0 !important;
 }
 .sidebar-versions-others dd:first-of-type {
   padding-right: .5rem;
diff --git a/docs/conf.py b/docs/conf.py
index 94469454aa46..be5e01fe11bf 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -98,7 +98,11 @@
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
 # documentation.
-# html_theme_options = { "github_fork": "Billy2011/streamlink-27" }
+html_theme_options = {
+    "source_repository": "https://github.com/Billy2011/streamlink-27/",
+    "source_branch": "master",
+    "source_directory": "docs/",
+}
 
 # Add any paths that contain custom themes here, relative to this directory.
 #html_theme_path = []