update for Issue #2064 (changed docblocks which return $this or only call a method that returns $this to @return CI_DB_class_name)
diff --git a/system/core/Security.php b/system/core/Security.php
index c415544..3bf6266 100644
--- a/system/core/Security.php
+++ b/system/core/Security.php
@@ -151,7 +151,7 @@
 	/**
 	 * CSRF Verify
 	 *
-	 * @return	object
+	 * @return	CI_Security
 	 */
 	public function csrf_verify()
 	{
@@ -202,7 +202,7 @@
 	 * CSRF Set Cookie
 	 *
 	 * @codeCoverageIgnore
-	 * @return	object
+	 * @return	CI_Security
 	 */
 	public function csrf_set_cookie()
 	{