diff --git a/zscript.txt b/zscript.txt
index b7effe9..16b410b 100644
--- a/zscript.txt
+++ b/zscript.txt
@@ -1,4 +1,4 @@
-version "3.6"
+version "3.5"
 
 #include "zscript/mk_matrix.zsc"
 #include "zscript/mk_coordutil.zsc"