diff --git a/day17/Makefile b/day17/Makefile
index c1f54ca..55d6808 100644
--- a/day17/Makefile
+++ b/day17/Makefile
@@ -15,12 +15,12 @@ output:
 
 compile: ex1-c ex2-c
 
-ex1:
+ex1: ex1-c
 	@$(TIME) ex1-v1.bash < $(INPUT) 2>&1
 	@$(TIME) ex1.bash < $(INPUT) 2>&1
 	@$(TIME) ex1-c < $(INPUT) 2>&1
 
-ex2:
+ex2: ex2-c
 	@$(TIME) ex2.bash < $(INPUT) 2>&1
 	@$(TIME) ex2-c < $(INPUT) 2>&1