diff --git a/ambientd.c b/ambientd.c
index 109580d..7bd413e 100644
--- a/ambientd.c
+++ b/ambientd.c
@@ -21,7 +21,7 @@ char STR_BUFFER[128] = {0};
 FILE *luminance_fp = NULL;
 
 // max luminance that the display can output
-int max_luminance = 400;
+int max_luminance = 550;
 
 // minimum display brightness in percent
 float min_brightness_percent = 0.05;