diff --git a/carfield.mk b/carfield.mk
index a2faf997..e1cacaf4 100644
--- a/carfield.mk
+++ b/carfield.mk
@@ -422,7 +422,7 @@ car-check-litmus-tests: $(LITMUS_WORK_DIR)/litmus.log
 ##############
 tech-repo := git@iis-git.ee.ethz.ch:Astral/gf12.git
 # no commit by default, change during development
-tech-commit := 85ef88fcf3709571850ed9abcafc854e3df861bd # branch: lg/pss_sim
+tech-commit := f78372d56569d8d9843c6c3a0268434eaeb6384e # branch: lg/pss_sim
 
 tech-clone:
 	git clone $(tech-repo) tech