diff --git a/main.c b/main.c
index 0a634d5..28a1203 100644
--- a/main.c
+++ b/main.c
@@ -25,7 +25,7 @@
 #include <time.h>
 
 #define PROG_UPDATEPRD 20
-#define NPUZZLES 1024U
+#define NPUZZLES 256U
 
 static uint32_t getseed(void)
 {