diff --git a/source/_posts/2019-09-13-live-blogging-symfonylive-london.md b/source/_posts/2019-09-13-live-blogging-symfonylive-london.md
index d56697d69..b3bf8e857 100644
--- a/source/_posts/2019-09-13-live-blogging-symfonylive-london.md
+++ b/source/_posts/2019-09-13-live-blogging-symfonylive-london.md
@@ -151,3 +151,4 @@ Notifier
 ### Issues
 
 * Transformers, takes an object and transforms into an array - `FooTransformer implements TransformerInterface`.
+* Don't break other apps by changing the payload.