diff --git a/composer.json b/composer.json
index e6ff864..f46b1a7 100644
--- a/composer.json
+++ b/composer.json
@@ -15,6 +15,11 @@
         "psr-4": {
             "SilverStripe\\MathSpamProtection\\": "code/"
         }
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "3.x-dev"
+        }
     },
 	"license": "BSD-3-Clause"
 }