diff --git a/composer.json b/composer.json
index ed0bc65..46e51f2 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
 	"name": "undefinedoffset/sortablegridfield",
-	"description": "Adds drag and drop functionality to SilverStripe 3.0's GridField",
+	"description": "Adds drag and drop functionality to SilverStripe 4.x's GridField",
 	"type": "silverstripe-module",
 	"keywords": ["silverstripe", "gridfield"],
     "license": "BSD-3-Clause",
@@ -11,15 +11,24 @@
 			"role": "Developer"
 		}
 	],
-	"require":
-	{
-		"silverstripe/framework": ">=3.0.1",
-		"composer/installers": "*"
+	"require": {
+		"silverstripe/admin": "^1.0@dev",
+		"silverstripe/framework": "^4.0@dev",
+		"silverstripe/versioned": "^1.0"
+	},
+	"autoload": {
+		"psr-4": {
+			"UndefinedOffset\\SortableGridField\\": "src/",
+			"UndefinedOffset\\SortableGridField\\Tests\\": "tests/"
+		}
 	},
 	"support": {
 		"issues": "https://github.com/undefinedoffset/SortableGridField/issues"
 	},
 	"extra": {
-		"installer-name": "sortablegridfield"
+		"installer-name": "sortablegridfield",
+		"branch-alias": {
+			"dev-master": "1.0.x-dev"
+		}
 	}
 }