diff --git a/README.md b/README.md
index e2fed1eb7f..c30805d523 100644
--- a/README.md
+++ b/README.md
@@ -259,7 +259,7 @@ Note: settings starting with `AZURE_SEARCH` are only needed when using Azure Ope
 |PROMPTFLOW_ENDPOINT||URL of the deployed Promptflow endpoint e.g. https://pf-deployment-name.region.inference.ml.azure.com/score|
 |PROMPTFLOW_API_KEY||Auth key for deployed Promptflow endpoint. Note: only Key-based authentication is supported.|
 |PROMPTFLOW_RESPONSE_TIMEOUT|120|Timeout value in seconds for the Promptflow endpoint to respond.|
-|PROMPTFLOW_REQUEST_FIELD_NAME|query|Default field name to construct Promptflow request. Note: chat_history is auto constucted based on the interaction, if your API expects other mandatory field you will need to change the request parameters under `promptflow_request` function.|
+|PROMPTFLOW_REQUEST_FIELD_NAME|query|Default field name to construct Promptflow request. Note: chat_history is auto constructed based on the interaction, if your API expects other mandatory field you will need to change the request parameters under `promptflow_request` function.|
 |PROMPTFLOW_RESPONSE_FIELD_NAME|reply|Default field name to process the response from Promptflow request.|
 |PROMPTFLOW_CITATIONS_FIELD_NAME|documents|Default field name to process the citations output from Promptflow request.|