diff --git a/kalkbreite.md b/kalkbreite.md
index c1100d3e9..1bf949d6d 100644
--- a/kalkbreite.md
+++ b/kalkbreite.md
@@ -2,6 +2,8 @@
 
 - [[go]] https://www.kalkbreite.net/
 
+https://twitter.com/flancian/status/1378432911137996806
+
 
 [//begin]: # "Autogenerated link references for markdown compatibility"
 [go]: go "Go"