diff --git a/README.md b/README.md
index 7b79017..cd027ee 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 CAD files for noisy cricket
 ===========================
 
-Create lower case and plate files by running:
+Create stl and 3mf files for lower case and plate files by running (needs openscad):
 
 ```shell
 make render