diff --git a/services/loopback/common/models/tag.json b/services/loopback/common/models/tag.json
index b327c6588..e35a7eddc 100644
--- a/services/loopback/common/models/tag.json
+++ b/services/loopback/common/models/tag.json
@@ -18,7 +18,7 @@
         "required": true
       },
       "isFree": {
-        "type": "Number"
+        "type": "Boolean"
       },
       "sourceTable": {
         "type": "String"