diff --git a/composer.json b/composer.json
index fe52322..76fae8b 100755
--- a/composer.json
+++ b/composer.json
@@ -8,12 +8,12 @@
 	],
 	"type": "silverstripe-module",
 	"require": {
-		"silverstripe/cms": "^3.1.0",
-		"silverstripe/lumberjack": "~1.1",
-		"silverstripe/tagfield": "^1.0"
+		"silverstripe/cms": "^4.0",
+		"silverstripe/lumberjack": "^2.0",
+		"silverstripe/tagfield": "^2.0"
 	},
 	"require-dev": {
-		"phpunit/PHPUnit": "~3.7@stable"
+		"phpunit/PHPUnit": "~4.8"
 	},
 	"extra": {
 		"branch-alias": {