diff --git a/README.md b/README.md
index 244f5351ddd0ac9ffa55c68ab2b353bd102d2eb6..45dc0714ddfb4c48ffec9bd6723e41487278d96f 100644
--- a/README.md
+++ b/README.md
@@ -494,7 +494,7 @@ $ make -s docker-push
 You can manage your containers with the other make commands: dstop, dstart,
 drm, etc.
 
-:alert: To avoid [CORS-related
+:warning: To avoid [CORS-related
 errors](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors) when
 connecting to the application portal, make sure to point your browser to the URL
 'http://localhost:3000'.
@@ -523,7 +523,7 @@ service redeployment.
 :bulb: You may notice that the backend deployment service is of type
 'NodePort': that allows the KinD worker node (IP like '172.x.x.x') to expose a
 port (by default '30080') that shall be forwarded (e.g., via `socat`) to the
-port expected by the frontend ('8000'). :alert: **Without the port forwarding,
+port expected by the frontend ('8000'). :warning: **Without the port forwarding,
 the frontend will not be able to connect to the backend!**
 
 Example. After deploying the backend, get the worker node's IP: