diff --git a/Firmware/src/main.cpp b/Firmware/src/main.cpp
index b03a869..ff77688 100644
--- a/Firmware/src/main.cpp
+++ b/Firmware/src/main.cpp
@@ -67,7 +67,7 @@ void init_wdt()
   WDTCSR |= (1<<WDCE) | (1<<WDE);
   // Set new prescaler (8 sec), unset reset enable
   // enable WDT interrupt
-  WDTCSR = (1<<WDIE)|(1<<WDP2)|(1<<WDP0);
+  WDTCSR = (1<<WDIE)|(1<<WDP3)|(1<<WDP0);
 }
 
 // Enter Sleepmode, Sleep for s Seconds
@@ -89,14 +89,14 @@ ISR(WATCHDOG_vect) {
   WDTCSR |= (1<<WDCE) | (1<<WDE);
   // Set new prescaler (8 sec), unset reset enable
   // enable WDT interrupt
-  WDTCSR = (1<<WDIE)|(1<<WDP2)|(1<<WDP0);
+  WDTCSR = (1<<WDIE)|(1<<WDP3)|(1<<WDP0);
 }
 
 // Get Battery Voltage
-long readVcc() {
+int32_t readVcc() {
   bitClear(PRR, PRADC);
   ADCSRA |= bit(ADEN); // Enable the ADC
-  long result;
+  int32_t result;
   ADMUX = _BV(MUX5) | _BV(MUX0); // For ATtiny84
   delay(2); // Wait for Vref to settle
   ADCSRA |= _BV(ADSC); // Convert