diff --git a/composer.lock b/composer.lock
index f23b84ea..d65f1d30 100644
--- a/composer.lock
+++ b/composer.lock
@@ -9,11 +9,11 @@
     "packages-dev": [
         {
             "name": "phpstan/phpstan",
-            "version": "2.1.40",
+            "version": "2.1.46",
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/9b2c7aeb83a75d8680ea5e7c9b7fca88052b766b",
-                "reference": "9b2c7aeb83a75d8680ea5e7c9b7fca88052b766b",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/a193923fc2d6325ef4e741cf3af8c3e8f54dbf25",
+                "reference": "a193923fc2d6325ef4e741cf3af8c3e8f54dbf25",
                 "shasum": ""
             },
             "require": {
@@ -58,7 +58,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2026-02-23T15:04:35+00:00"
+            "time": "2026-04-01T09:25:14+00:00"
         },
         {
             "name": "phpstan/phpstan-deprecation-rules",
@@ -275,5 +275,5 @@
         "ext-tokenizer": "*",
         "ext-xmlwriter": "*"
     },
-    "plugin-api-version": "2.6.0"
+    "plugin-api-version": "2.9.0"
 }
diff --git a/xExtension-WordHighlighter/extension.php b/xExtension-WordHighlighter/extension.php
index f6203f2c..3c56d5d7 100644
--- a/xExtension-WordHighlighter/extension.php
+++ b/xExtension-WordHighlighter/extension.php
@@ -63,7 +63,7 @@ public function handleConfigureAction(): void {
 				'enable_logs' => $this->enable_logs,
 				'case_sensitive' => $this->case_sensitive,
 				'separate_word_search' => $this->separate_word_search,
-				'words' => preg_split("/\r\n|\n|\r/", $configWordList),
+				'words' => preg_split("/\r\n|\n|\r/", $configWordList) ?: [],
 			];
 			$configJson = json_encode($configObj, WordHighlighterExtension::JSON_ENCODE_CONF);
 			file_put_contents(join_path($staticPath, ('config.' . $current_user . '.json')), $configJson . PHP_EOL);
@@ -80,7 +80,8 @@ public function handleConfigureAction(): void {
 				$this->enable_logs = (bool) ($confJson['enable_logs'] ?? false);
 				$this->case_sensitive = (bool) ($confJson['case_sensitive'] ?? false);
 				$this->separate_word_search = (bool) ($confJson['separate_word_search'] ?? false);
-				$this->word_highlighter_conf = implode("\n", (array) ($confJson['words'] ?? []));
+				$words = is_array($confJson['words']) ? array_filter($confJson['words'], static fn($word) => is_string($word)) : [];
+				$this->word_highlighter_conf = implode("\n", $words);
 			} catch (Exception $exception) { // phpcs:ignore Generic.CodeAnalysis.EmptyStatement.DetectedCatch
 				// probably nothing to do needed
 			}
diff --git a/xExtension-WordHighlighter/metadata.json b/xExtension-WordHighlighter/metadata.json
index f716b5c6..277eb39f 100644
--- a/xExtension-WordHighlighter/metadata.json
+++ b/xExtension-WordHighlighter/metadata.json
@@ -2,7 +2,7 @@
 	"name": "Word highlighter",
 	"author": "Lukas Melega",
 	"description": "Highlight specific words",
-	"version": "0.0.3",
+	"version": "0.0.4",
 	"entrypoint": "WordHighlighter",
 	"type": "user"
 }