diff --git a/ChangeLog b/ChangeLog
index 7366af8..04a4b39 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6,7 +6,7 @@ Version XXX:
   * Added:
     - Heartbeat messages. Signal other devices we're still active after some
       amount of messages. Stop raising exceptions when there is no payload.
-    - Commands to echo_bot. (verbose, error, chain_length)
+    - Commands to echo_bot. (verbose, error)
 Version 0.5.0:
 2021-07-12 Maxime “pep” Buquet <pep@bouah.net>
   * Added:
diff --git a/examples/echo_client.py b/examples/echo_client.py
index f7d8dd6..b91f0f3 100644
--- a/examples/echo_client.py
+++ b/examples/echo_client.py
@@ -90,8 +90,6 @@ class EchoBot(ClientXMPP):
             await self.cmd_verbose(mto, mtype)
         elif cmd == 'error':
             await self.cmd_error(mto, mtype)
-        elif cmd == 'chain_length':
-            await self.cmd_chain_length(mto, mtype)
 
         return None
 
@@ -114,15 +112,6 @@ class EchoBot(ClientXMPP):
         body = '''Debug level set to 'error'.'''
         return await self.encrypted_reply(mto, mtype, body)
 
-    async def cmd_chain_length(self, mto: JID, mtype: str) -> None:
-        chain_length = await self['xep_0384']._chain_lengths(mto)
-        should_heartbeat = await self['xep_0384'].should_heartbeat(mto)
-        body = (
-            'lengths: %r\n' % chain_length +
-            'should heartbeat: %r' % should_heartbeat
-        )
-        return await self.encrypted_reply(mto, mtype, body)
-
     def message_handler(self, msg: Message) -> None:
         asyncio.ensure_future(self.message(msg))