diff --git a/composer.json b/composer.json
index dac34e0..841f604 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
 		}
 	},
 	"require": {
-		"typo3/cms-core": "^12",
+		"typo3/cms-core": "^12 || ^13",
 		"michelf/php-markdown": "^1.9"
 	}
 }
\ No newline at end of file