diff --git a/technology/freepdk45/tech/tech.py b/technology/freepdk45/tech/tech.py
index de3629e3..f5decd3c 100644
--- a/technology/freepdk45/tech/tech.py
+++ b/technology/freepdk45/tech/tech.py
@@ -460,8 +460,8 @@ parameter["bitcell_drain_cap"] = 0.1        # In Femto-Farad, approximation of d
 # Technology Tool Preferences
 ###################################################
 
-drc_name = "klayout"
-lvs_name = "klayout"
-pex_name = "klayout"
+drc_name = "calibre"
+lvs_name = "calibre"
+pex_name = "calibre"
 
 blackbox_bitcell = False