diff --git a/.gitignore b/.gitignore
index 52dc8be..577a8bf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,6 +24,7 @@ fp-info-cache
 *.zip
 *.bom.csv
 *.cpl.csv
+*.3d.step
 *.versioned.*
 fabrication
 
diff --git a/Makefile b/Makefile
index 5d607d7..ba5f364 100644
--- a/Makefile
+++ b/Makefile
@@ -33,7 +33,7 @@ VERSIONED_SHEET = $(foreach SHEET,$(NAME) $(SUBSHEET),$(SHEET).versioned.kicad_s
 FABRICATION_DIR := fabrication
 IBOM := ${FABRICATION_DIR}/ibom.html
 
-all: $(VERSIONED_SHEET) ${NAME}.sch.pdf ${NAME}.brd-top.png ${NAME}.brd-bot.png ${NAME}.bom.csv fab
+all: $(VERSIONED_SHEET) ${NAME}.sch.pdf ${NAME}.brd-top.png ${NAME}.brd-bot.png ${NAME}.bom.csv ${NAME}.3d.step fab
 
 fab: ${FABRICATION_DIR} ${IBOM}
 
@@ -72,6 +72,10 @@ lib:
 %.bom.xml: %.versioned.kicad_sch %.versioned.kicad_pro
 	$(KICAD) sch export python-bom --output $@ $<
 
+# export 3D model
+%.3d.step: %.versioned.kicad_pcb
+	$(KICAD) pcb export step --output $@ $<
+
 # export Bill of Material (as CSV)
 %.bom.csv: %.bom.xml
 	python $(KIBOM) $< $@