diff --git a/API.md b/API.md
index 4f482842..0203567b 100644
--- a/API.md
+++ b/API.md
@@ -5,6 +5,7 @@ JSON over RESTful HTTP. Amounts are always represented in satoshis.
 The blockstream.info public APIs are available at:
 - Bitcoin: https://blockstream.info/api/
 - Bitcoin Testnet: https://blockstream.info/testnet/api/
+- Bitcoin Testnet4: https://blockstream.info/testnet4/api/
 - Bitcoin Signet: https://blockstream.info/signet/api/
 - Liquid: https://blockstream.info/liquid/api/
 - Liquid Testnet: https://blockstream.info/liquidtestnet/api/
diff --git a/client/src/views/nav-toggle.js b/client/src/views/nav-toggle.js
index 01f73dcc..ce54ee88 100644
--- a/client/src/views/nav-toggle.js
+++ b/client/src/views/nav-toggle.js
@@ -46,6 +46,7 @@ export default () =>
             <li><a href={`${siteRoot}/`} rel="external">Bitcoin</a></li>
             <li><a href={`${siteRoot}/liquid/`} rel="external">Liquid Network</a></li>
             <li><a href={`${siteRoot}/testnet/`} rel="external">Bitcoin Testnet</a></li>
+            <li><a href={`${siteRoot}/testnet4/`} rel="external">Bitcoin Testnet4</a></li>
             <li><a href={`${siteRoot}/liquidtestnet/`} rel="external">Liquid Testnet</a></li>
           </ul>
           <h4 className="menu-title font-h5">Developer Tools</h4>
diff --git a/flavors/blockstream/config.env b/flavors/blockstream/config.env
index bae7fb43..53d45d0a 100755
--- a/flavors/blockstream/config.env
+++ b/flavors/blockstream/config.env
@@ -20,6 +20,7 @@ export MENU_ITEMS='{
   "Bitcoin": "/"
 , "Liquid": "/liquid/"
 , "Bitcoin Testnet": "/testnet/"
+, "Bitcoin Testnet4": "/testnet4/"
 , "Liquid Testnet": "/liquidtestnet/"
 }'