diff --git a/playground/matplus/dan-funk/simple-user-task-schema.json b/playground/matplus/dan-funk/simple-user-task-schema.json
index 3467f53f..327dce36 100644
--- a/playground/matplus/dan-funk/simple-user-task-schema.json
+++ b/playground/matplus/dan-funk/simple-user-task-schema.json
@@ -3,7 +3,7 @@
   "description": "A simple form example.",
   "type": "object",
   "required": [
-    "firstName",
+    "first_name",
     "lastName"
   ],
   "properties": {