diff --git a/Makefile b/Makefile
index 7c38b34..236a9ee 100644
--- a/Makefile
+++ b/Makefile
@@ -21,16 +21,16 @@ $(DIRS):
 	@echo "⇒ Ensure dir: $@"
 	@mkdir -p $@
 
-in/airports.dat:
+in/airports.dat: $(DIRS)
 	wget -c https://raw.githubusercontent.com/jpatokal/openflights/master/data/airports.dat -O in/airports.dat
 
-in/countries.dat:
+in/countries.dat: $(DIRS)
 	wget -c https://raw.githubusercontent.com/jpatokal/openflights/master/data/countries.dat -O in/countries.dat
 
 in/continents.geojson: $(DIRS)
 	zcat continents.geojson.gz > in/continents.geojson
 
-unlocode:
+unlocode :$(DIRS)
 	wget -c https://service.unece.org/trade/locode/loc222csv.zip -O tmp/loc222csv.zip
 	unzip -u tmp/loc222csv.zip -d in/