diff --git a/terminal_keyboard_emulator.ino b/terminal_keyboard_emulator.ino
index 45d304a..8706bc0 100644
--- a/terminal_keyboard_emulator.ino
+++ b/terminal_keyboard_emulator.ino
@@ -13,7 +13,7 @@ const int outPin = 4; // out, kbd led
 
 // constant config
 const int slaveClockDivider = 8;
-const int timerDelay = 530 / slaveClockDivider;
+const int timerDelay = 520 / slaveClockDivider;
 
 // variables
 volatile int slaveClockStep = 0;