diff --git a/file/lib/form/ChatForm.class.php b/file/lib/form/ChatForm.class.php
index 4a8ec7e..9699c8f 100644
--- a/file/lib/form/ChatForm.class.php
+++ b/file/lib/form/ChatForm.class.php
@@ -45,7 +45,7 @@ public function readData() {
 	public function readFormParameters() {
 		parent::readFormParameters();
 		
-		if (isset($_REQUEST['text'])) $this->message = StringUtil::trim($_REQUEST['text']);
+		if (isset($_REQUEST['text'])) $this->message = \wcf\util\MessageUtil::stripCrap(StringUtil::trim($_REQUEST['text']));
 		if (isset($_REQUEST['smilies'])) $this->enableSmilies = intval($_REQUEST['smilies']);
 	}
 	
diff --git a/package.xml b/package.xml
index df7cda5..8609d5e 100644
--- a/package.xml
+++ b/package.xml
@@ -19,6 +19,7 @@
 		<requiredpackage minversion="2.0.0 Alpha 1">com.woltlab.wcf</requiredpackage>
 		<requiredpackage minversion="1.0.0 Alpha 1">com.woltlab.wcf.bbcode</requiredpackage>
 		<requiredpackage minversion="1.0.0 Alpha 1">com.woltlab.wcf.acl</requiredpackage>
+		<requiredpackage minversion="1.0.0 Alpha 1">com.woltlab.wcf.message</requiredpackage>
 	</requiredpackages>
 	
 	<instructions type="install">