diff --git a/README.md b/README.md
index 45653ca..a0150e4 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ npm install schema-utils
   "type": "object",
   "properties": {
     "option": {
-      "type": ["boolean"]
+      "type": "boolean"
     }
   },
   "additionalProperties": false