diff --git a/docs/pipes.md b/docs/pipes.md
index 37ebd08..072980e 100644
--- a/docs/pipes.md
+++ b/docs/pipes.md
@@ -53,4 +53,6 @@ export class FilterPipe implements PipeTransform {
   }
 
 }
-```
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+```
+
+If Data are changed, the pipe dont get updated. For example if the application applies a filer pipe.
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