diff --git a/README.md b/README.md
index 9cc1323..509a243 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,10 @@ pn.format(True)
 
 See [organisationsnummer/tests/test_organisationsnummer.py](organisationsnummer/tests/test_organisationsnummer.py) for more examples.
 
+## In memoriam
+
+Fredrik "Frozzare" Forsmo (1991-2026) was the initiator, co-founder and a core contributor of the organisationsnummer project. This library carries his work. He is missed.
+
 ## License
 
 MIT