diff --git a/README.md b/README.md
index 9d95c82..3d17019 100644
--- a/README.md
+++ b/README.md
@@ -107,6 +107,10 @@ The following payload will succeed.
 client-payload: '{"github": ${{ toJson(github) }}}'
 ```
 
+Additionally there is a limitation regarding the maximun length of strings, you are allowed to pass within `client-payload`.
+This might get into your way when you try to pass a Pull Request body.
+In this cases you might consider truncating the overlong strings.
+
 ## License
 
 [MIT](LICENSE)