diff --git a/_config.php b/_config.php
index c772bab..e5899f8 100644
--- a/_config.php
+++ b/_config.php
@@ -14,5 +14,5 @@ if(class_exists('Comment')) {
 	 * If the comments module is installed then add the spam protection module 
 	 * to the comments form via this extension
 	 */
-	Object::add_extension('CommentingController', 'CommentSpamProtection');
+	CommentingController::add_extension('CommentSpamProtection');
 }
\ No newline at end of file
diff --git a/composer.json b/composer.json
index bea8d3d..62b1cd8 100644
--- a/composer.json
+++ b/composer.json
@@ -9,9 +9,8 @@
 	}, {
 		"name": "Will Rossiter",
 		"email": "will@fullscreen.io"
-	}
-	],
+	}],
 	"require": {
-		"silverstripe/framework": "3.*"
+		"silverstripe/framework": "3.1.*"
 	}
 }
\ No newline at end of file