diff --git a/node-red-node-wot/plugin-resources-src/node-wot-plugin-lib.ts b/node-red-node-wot/plugin-resources-src/node-wot-plugin-lib.ts
index dc3c2ab..0ce0992 100644
--- a/node-red-node-wot/plugin-resources-src/node-wot-plugin-lib.ts
+++ b/node-red-node-wot/plugin-resources-src/node-wot-plugin-lib.ts
@@ -14,7 +14,7 @@ const DATATYPES = {
     },
     boolean: {
         inputMode: "text",
-        typeConvert: "String",
+        typeConvert: "JSON.parse",
     },
     object: {
         inputMode: "textarea",