diff --git a/Somfy.h b/Somfy.h
index 287dde3..340cc18 100644
--- a/Somfy.h
+++ b/Somfy.h
@@ -8,7 +8,7 @@
 #define MINS_TO_MILLIS(x) SECS_TO_MILLIS((x) * 60)
 
 #define SOMFY_SUN_TIMEOUT MINS_TO_MILLIS(2)
-#define SOMFY_NO_SUN_TIMEOUT MINS_TO_MILLIS(15)
+#define SOMFY_NO_SUN_TIMEOUT MINS_TO_MILLIS(20)
 
 #define SOMFY_WIND_TIMEOUT SECS_TO_MILLIS(2)
 #define SOMFY_NO_WIND_TIMEOUT MINS_TO_MILLIS(12)