diff --git a/action.yml b/action.yml
index cdb7b02..c74c5b6 100644
--- a/action.yml
+++ b/action.yml
@@ -21,6 +21,12 @@ inputs:
     required: false
     type: string
 
+  ACTIVITY_TYPES:
+    description: "Comma-seperated types of deployments to wait for. Default: push - See types here: https://docs.platform.sh/integrations/activity/reference.html#environment-activity-types"
+    default: "push"
+    required: true
+    type: string
+
   DEPLOY_STATUS_PATH:
     description: 'The location of the deploy-status file on the website.'
     default: '/sites/default/files/deploy-status'