diff --git a/README.md b/README.md
index dde98fc..9924fe7 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ SortableGridField
 Adds drag and drop functionality to SilverStripe 3's GridField
 
 ## Requirements
-* SilverStripe 3.x
+* SilverStripe 3.0.x or 3.1.x
 
 ## Installation
 * Download the module from here https://github.com/UndefinedOffset/SortableGridField/archive/master.zip
diff --git a/composer.json b/composer.json
index df27fd9..f0fc3d5 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
 	],
 	"require":
 	{
-		"silverstripe/framework": "3.*",
+		"silverstripe/framework": ">=3.0.1,<3.2",
 		"composer/installers": "*"
 	},
 	"support": {