diff --git a/src/DiscourseAPI.php b/src/DiscourseAPI.php
index 3de972b..85acf59 100644
--- a/src/DiscourseAPI.php
+++ b/src/DiscourseAPI.php
@@ -541,7 +541,7 @@ public function createUser(
 	) {
 
 		// we need to call hp.json to get a challenge string
-		$challengeStringObject = $this->_getRequest( '/users/hp.json' );
+		$challengeStringObject = $this->_getRequest( '/session/hp.json' );
 		if ( $challengeStringObject->http_code !== 200 ) {
 			return false;
 		}
@@ -1305,4 +1305,4 @@ public function getTopTopics( string $period = 'yearly', string $userName = 'sys
 
 		return $res;
 	}
-}
\ No newline at end of file
+}