diff --git a/src/Servo.h b/src/Servo.h
index 47365d8..830edad 100644
--- a/src/Servo.h
+++ b/src/Servo.h
@@ -83,8 +83,8 @@
 
 #define Servo_VERSION           2     // software version of this library
 
-#define MIN_PULSE_WIDTH       544     // the shortest pulse sent to a servo
-#define MAX_PULSE_WIDTH      2400     // the longest pulse sent to a servo
+#define MIN_PULSE_WIDTH       500     // the shortest pulse sent to a servo
+#define MAX_PULSE_WIDTH      2500     // the longest pulse sent to a servo
 #define DEFAULT_PULSE_WIDTH  1500     // default pulse width when servo is attached
 #define REFRESH_INTERVAL    20000     // minimum time to refresh servos in microseconds