diff --git a/lib.php b/lib.php
index 3cb17c6..2ff5857 100644
--- a/lib.php
+++ b/lib.php
@@ -418,7 +418,7 @@ class plagiarism_plugin_pchkorg extends plagiarism_plugin {
                 $response = $attempt->get_response_summary();
                 $signature = sha1($response);
             } else {
-                $signature = sha1($linkarray('content'));
+                $signature = sha1($linkarray['content']);
             }
             $where->signature = $signature;
             $where->fileid = null;
diff --git a/version.php b/version.php
index 571a849..0bf7abb 100644
--- a/version.php
+++ b/version.php
@@ -26,9 +26,9 @@ defined('MOODLE_INTERNAL') || die();
 if (!isset($plugin)) {
     $plugin = new stdClass();
 }
-$plugin->version = 2024100719;
+$plugin->version = 2024100814;
 $plugin->requires = 2020061501; // Requires Moodle 3.9 .
-$plugin->release = 'v3.15.2';
+$plugin->release = 'v3.15.3';
 $plugin->component = 'plagiarism_pchkorg';
 $plugin->maturity = MATURITY_STABLE;
 $plugin->dependencies = array(