diff --git a/jupyter_server_terminals/terminalmanager.py b/jupyter_server_terminals/terminalmanager.py
index 8a742d7..580e55b 100644
--- a/jupyter_server_terminals/terminalmanager.py
+++ b/jupyter_server_terminals/terminalmanager.py
@@ -164,3 +164,6 @@ async def _cull_inactive_terminal(self, name):
                     "Culling terminal '%s' due to %s seconds of inactivity.", name, inactivity
                 )
                 await self.terminate(name, force=True)
+
+    def pre_pty_read_hook(self, ptywclients):
+        ptywclients.last_activity = utcnow()