diff --git a/docs/docs/policy-reference/keywords/_examples/not/undefined/input.json b/docs/docs/policy-reference/keywords/_examples/not/undefined/input.json
index 5cd2e420b6..785edf62ee 100644
--- a/docs/docs/policy-reference/keywords/_examples/not/undefined/input.json
+++ b/docs/docs/policy-reference/keywords/_examples/not/undefined/input.json
@@ -1,4 +1,4 @@
 {
   "e_mail": "oops@example.com",
-  "age": "20"
+  "age": 20
 }