diff --git a/Makefile b/Makefile
index 5c1f2f3..f93eb00 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,8 @@
+PROJECTS = $(wildcard ./[0-9]*-*)
 
 
 all:
-	cd 01-flickr && $(MAKE) && cd .. && \
-	cd 02-shipping && $(MAKE) && cd .. && \
-	cd 03-yahoo-weather && $(MAKE) && cd .. && \
-	cd 04-employee-crud && $(MAKE)
+	@for project in $(PROJECTS) ; \
+	do \
+		cd $$project && $(MAKE) && cd .. ; \
+	done