diff --git a/specification/cognitiveservices/data-plane/LUIS/Runtime/stable/v2.0/LUIS-Runtime.json b/specification/cognitiveservices/data-plane/LUIS/Runtime/stable/v2.0/LUIS-Runtime.json
index d7fc0efa87ae..891e643bbab2 100644
--- a/specification/cognitiveservices/data-plane/LUIS/Runtime/stable/v2.0/LUIS-Runtime.json
+++ b/specification/cognitiveservices/data-plane/LUIS/Runtime/stable/v2.0/LUIS-Runtime.json
@@ -310,11 +310,11 @@
           "description": "Type of the entity, as defined in LUIS."
         },
         "startIndex": {
-          "type": "number",
+          "type": "integer",
           "description": "The position of the first character of the matched entity within the utterance."
         },
         "endIndex": {
-          "type": "number",
+          "type": "integer",
           "description": "The position of the last character of the matched entity within the utterance."
         }
       },