diff --git a/wmbiff-0.4.27/wmbiff/wmbiff.c b/wmbiff-0.4.27/wmbiff/wmbiff.c
index 714f7db..25ecfbe 100644
--- a/wmbiff-0.4.27/wmbiff/wmbiff.c
+++ b/wmbiff-0.4.27/wmbiff/wmbiff.c
@@ -49,7 +49,7 @@ static const int wmbiff_mask_width = 64;
 #define CHAR_HEIGHT 7
 
 #define BLINK_TIMES 8
-#define DEFAULT_SLEEP_INTERVAL 5000
+#define DEFAULT_SLEEP_INTERVAL 20000
 #define BLINK_SLEEP_INTERVAL    200
 #define DEFAULT_LOOP 5