diff --git a/makefile b/makefile
index 86ccb0e..a62d7ba 100644
--- a/makefile
+++ b/makefile
@@ -32,12 +32,24 @@ doble : main.o $(program_obj_files)
 $(program_obj_filesobj_files): %.o: %.c
 	$(CC) -c $(FLAGS) $^ -o $@
 
+main.o: main.c
+	$(CC) -c $(FLAGS) main.c
+
 numbers.o: numbers.c
 	$(CC) -c $(CFLAGS) numbers.c
 
 bintree.o: bintree.c
 	$(CC) -c $(CFLAGS) bintree.c
 
+timer.o: timer.c
+		$(CC) -c $(CFLAGS) timer.c
+
+stack.o: stack.c
+	$(CC) -c $(CFLAGS) stack.c
+
+highscore.o: highscore.c
+	$(CC) -c $(CFLAGS) highscore.c
+
 
 # --------------------------
 # Unit Tests