diff --git a/README.md b/README.md
index 413fff0..e6ea069 100644
--- a/README.md
+++ b/README.md
@@ -35,3 +35,6 @@
 - first beta release!
 - minor bugfixes with gui
 - updates the save templates
+
+### v1.5-alpha
+- added 3 difficulty levels for layer hardness