diff --git a/composer.json b/composer.json
index 279d296..15cfdbe 100644
--- a/composer.json
+++ b/composer.json
@@ -9,9 +9,6 @@
       "email": "a@alexstandiford.com"
     }
   ],
-  "require": {
-    "underpin/underpin": "1.2.*"
-  },
   "autoload": {
     "files": [
       "sidebars.php"