diff --git a/composer.json b/composer.json
index 9c845313d4678b949767a6b991fc8c96280eea5e..1d5d816666f5a11a14cc57777d1a3fa7304f0611 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
 		}
 	],
 	"require": {
-		"typo3/cms-core": "^7.6"
+		"typo3/cms-core": "7.6.0 - 8.7.99"
 	},
 	"replace": {
 		"sg_mail": "self.version"
diff --git a/ext_emconf.php b/ext_emconf.php
index bbf90748a1c995145cd7739ab37701642cb61635..026c4058a7116d9df4570214cfd2f8c22110cf49 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -20,7 +20,7 @@ $EM_CONF['sg_mail'] = array (
 	array (
 		'depends' =>
 		array (
-			'typo3' => '7.6.0-7.9.99',
+			'typo3' => '7.6.0-8.7.99',
 			'php' => '5.5.0-7.0.99',
 		),
 		'conflicts' =>