diff --git a/technology/scn4m_subm/tech/tech.py b/technology/scn4m_subm/tech/tech.py
index 374ba4c8..ee63203c 100644
--- a/technology/scn4m_subm/tech/tech.py
+++ b/technology/scn4m_subm/tech/tech.py
@@ -428,8 +428,8 @@ spice["sa_transconductance"] = (spice["mobility_n"])*spice["cox"]*(parameter["sa
 drc_name = "magic"
 lvs_name = "netgen"
 pex_name = "magic"
-drc_name = "klayout"
-lvs_name = "klayout"
-pex_name = "klayout"
+# drc_name = "klayout"
+# lvs_name = "klayout"
+# pex_name = "klayout"
 
 blackbox_bitcell = False