diff --git a/README.md b/README.md
index 8deb079..a3110ae 100644
--- a/README.md
+++ b/README.md
@@ -221,4 +221,5 @@ in the Python folder.
 - https://www.imc-tm.de/produkte/messtechnik-hardware/imc-cronosflex/ueberblick/
 - https://cython.readthedocs.io/en/latest/src/userguide/wrapping_CPlusPlus.html
 - https://github.com/Apollo3zehn/ImcFamosFile
+- https://apollo3zehn.github.io/ImcFamosFile/api/ImcFamosFile.FamosFileKeyType.html
 - https://pypi.org/help/#apitoken