diff --git a/en/gdpr.md b/en/gdpr.md
index 67cc8c837..9e2f8d33d 100644
--- a/en/gdpr.md
+++ b/en/gdpr.md
@@ -22,7 +22,7 @@ Delta Chat is an e-mail app that follows a strict privacy-by-design approach. Al
         <tr>
             <td>Confidentiality</td>
             <td>
-<b>End-to-end encryption</b> by implementing <a href="https://autocrypt.org">Autocrypt</a> and <a href="https://countermitm.readthedocs.io/en/latest/new.html">Verified groups</a>. User-friendly end-to-end encryption means that the requirements of the GDPR are already implemented at the technical level, <b>Privacy by Design</b>.
+<b>End-to-end encryption</b> by implementing <a href="https://autocrypt.org">Autocrypt</a> and <a href="https://securejoin.delta.chat/en/latest/new.html">Verified groups</a>. User-friendly end-to-end encryption means that the requirements of the GDPR are already implemented at the technical level, <b>Privacy by Design</b>.
             </td>
         </tr>
         <tr>
diff --git a/en/help.md b/en/help.md
index 363c0765c..d166383e7 100644
--- a/en/help.md
+++ b/en/help.md
@@ -274,7 +274,7 @@ Autocrypt uses a limited and [secure subset of the OpenPGP standard](#openpgp-se
 End-to-End encrypted messages are marked with a padlock 
 <img style="vertical-align:middle; width:1.2em; margin:1px" src="../assets/help/lock-icon.png" alt="padlock"/>.
 
-[Secure-Join protocols](https://countermitm.readthedocs.io/en/latest/new.html)
+[Secure-Join protocols](https://securejoin.delta.chat/en/latest/new.html)
 are used for establishing chats with guaranteed end-to-end encryption 
 which protects against network attacks and compromised servers.
 Chats marked with a green checkmark 
@@ -326,7 +326,7 @@ One of you is the "Inviter", the other is the "Joiner".
 
 **Both Inviter and Joiner**:
 
-Wait while [Secure-Join network messages are exchanged](https://countermitm.readthedocs.io/en/latest/new.html#setup-contact-protocol) between both devices.
+Wait while [Secure-Join network messages are exchanged](https://securejoin.delta.chat/en/latest/new.html#setup-contact-protocol) between both devices.
 
 - If both devices are online,
   both sides will eventually see a (group or direct) chat with a green checkmark
@@ -370,7 +370,7 @@ but there is no green checkmark in the profile title.
 This usually means that the contact ["sent a message from another device"](#nocryptanymore). 
 
 For more in-depth discussion of "guaranteed end-to-end encryption"
-please see [Secure-Join protocols](https://countermitm.readthedocs.io/en/latest/new.html)
+please see [Secure-Join protocols](https://securejoin.delta.chat/en/latest/new.html)
 and specifically read about "Verified Groups", the technical term
 of what is called here "green-checkmarked" or "guaranteed end-to-end encrypted" chats.
 
diff --git a/en/index.md b/en/index.md
index e27997edd..d57984a8f 100644
--- a/en/index.md
+++ b/en/index.md
@@ -9,7 +9,7 @@ lang: en
 
 🥳 Enjoy interactive chat experiences through [webxdc apps](https://webxdc.org).
 
-🔒 End-to-End Encryption using [Autocrypt](https://autocrypt.org) and [CounterMITM](https://countermitm.readthedocs.io/en/latest/new.html) protocols, with [multiple security audits](https://delta.chat/en/2023-03-27-third-independent-security-audit). 
+🔒 End-to-End Encryption using [Autocrypt](https://autocrypt.org) and [SecureJoin](https://securejoin.delta.chat/en/latest/new.html) protocols, with [multiple security audits](https://delta.chat/en/2023-03-27-third-independent-security-audit). 
 
 # Available on mobile and desktop