diff --git a/README.md b/README.md
index 4a569b9..f502187 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,9 @@ version = "0.0.1-SNAPSHOT"
 
 3. In your springboot project, add `application-local.yml` in `build/resources`
 
+**NOTE: Ensure there is no FIRETAIL_URL and FIRETAIL_API_KEY variable in your environment,**
+        **else this will override your yaml file configuration**
+
 ```yaml
 firetail:
   apikey: "PS-02....441b09761c3"