diff --git a/README.md b/README.md
index 0495974..f7c667a 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,7 @@ jobs:
 |escapeData| Escape newlines in data string content. Use 'true' (string) as value to enable it ||
 |preventFailureOnNoResponse| Prevent this Action to fail if the request respond without an response. Use 'true' (string) as value to enable it ||
 |ignoreStatusCodes| Prevent this Action to fail if the request respond with one of the configured Status Codes. Example: '404,401' ||
+|httpsCA| Certificate authority as string in PEM format ||
 
 ### Response