diff --git a/OpenAIREGatewayPlugin.php b/OpenAIREGatewayPlugin.php
index 1173b13..579bff2 100644
--- a/OpenAIREGatewayPlugin.php
+++ b/OpenAIREGatewayPlugin.php
@@ -15,6 +15,8 @@
 
 namespace APP\plugins\generic\openAIRE;
 
+use APP\journal\JournalDAO;
+use PKP\db\DAORegistry;
 use PKP\core\PKPString;
 use PKP\plugins\GatewayPlugin;
 
@@ -62,8 +64,8 @@ function fetch($args, $request) {
 			return false;
 		}
 
-		$scheme = array_shift($args);
-		switch ($scheme) {
+		$type = array_shift($args);
+		switch ($type) {
 			case 'objects':
 				$this->showObjects();
 				break;
@@ -78,9 +80,9 @@ function fetch($args, $request) {
 	}
 
 	function showObjects() {
-		$journalDao = DAORegistry::getDAO('JournalDAO');
-		$issueDao = DAORegistry::getDAO('IssueDAO');
-		$journals = $journalDao->getAll(true);
+        $journalDao = DAORegistry::getDAO('JournalDAO'); /** @var JournalDAO $journalDao */
+        $journals = $journalDao->getAll(true);
+
 		$request = $this->getRequest();
 		$dispatcher = $request->getDispatcher();
 		header('content-type: text/plain');
diff --git a/version.xml b/version.xml
index 6619f91..d11727a 100644
--- a/version.xml
+++ b/version.xml
@@ -13,8 +13,8 @@
 <version>
 	<application>openAIRE</application>
 	<type>plugins.generic</type>
-	<release>3.4.0.1</release>
-	<date>2024-02-22</date>
+	<release>3.4.0.2</release>
+	<date>2024-02-27</date>
 	<lazy-load>1</lazy-load>
 	<class>OpenAIREPlugin</class>
 </version>