diff --git a/blockbot/blockbot.php b/blockbot/blockbot.php
index eee222df..b602bf63 100644
--- a/blockbot/blockbot.php
+++ b/blockbot/blockbot.php
@@ -48,7 +48,8 @@ function blockbot_init_1(App $a) {
 
 	// List of "good" crawlers
 	$good_agents = ['fediverse.space crawler', 'fediverse.network crawler', 'Active_Pods_CheckBot_3.0',
-			'Social-Relay/', 'Test Certificate Info', 'Uptimebot/', 'GNUSocialBot', 'UptimeRobot/'];
+		'Social-Relay/', 'Test Certificate Info', 'Uptimebot/', 'GNUSocialBot', 'UptimeRobot/',
+		'PTST/'];
 
 	// List of known crawlers.
 	$agents = ['SemrushBot', 's~feedly-nikon3', 'Qwantify/Bleriot/', 'ltx71', 'Sogou web spider/',