diff --git a/README.txt b/README.txt
index 486f7b2..210d911 100644
--- a/README.txt
+++ b/README.txt
@@ -9,6 +9,7 @@ It's based on an internal timer and it requires no external hardware.
 
 VERSION HISTORY
 
+2017/01/27 - v. 1.2.7: added support for ATmega32U4 (thanks to Esteban Torre and piluex)
 2016/05/21 - v. 1.2.6: fixed timestamp functions when we are in leap years (I hope definitely..)
 2016/02/21 - v. 1.2.5: fixed a bug into the deltaT arithmetics that leads to double count the computation.
 2016/02/14 - v. 1.2.4: updated to use with latest Arduino IDE branches (>=1.6.7)
@@ -175,10 +176,14 @@ The library uses the Timer 0 because Timer 1 is a 16 bit counter that is a littl
 ATMEL Atmega644/1284
 The library uses the Timer 2, so keep it in mind if you think to use PWM on phisical pins 20 & 21.
 
+ATMEL ATmega32U4:
+The library uses the Timer 3 on this chip.
+
 ** I M P O R T A N T **
 The library supports, due to rounding issues, only the following speed clocks:
 - Atmega644/1284, Atmega48/88/168/328, Atmega8, Atmega640/1280/1281/2560/2561: 1, 4, 8, and 16 MHz
 - Attiny25/45/85, Attiny24/44/84, Attiny2313: 1, 8, and 16 MHz
+- Atmega32U4: only 16 MHz
 
 ********************************************************************
 
@@ -212,4 +217,4 @@ lesto - from <www.arduino.cc> forum
 
 ********************************************************************
 
-Last document revision: 2016/05/22
+Last document revision: 2017/01/27
\ No newline at end of file
diff --git a/library.properties b/library.properties
index b406f74..cf3a1e8 100755
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=swRTC
-version=1.2.6
+version=1.2.7
 author=Leonardo Miliani, lesto
 maintainer=Leonardo Miliani
 sentence=Software implementation of a Real-Time Clock for Arduino boards and Atmel microcontrollers.
diff --git a/swRTC.h b/swRTC.h
index 3093c5e..1914d84 100644
--- a/swRTC.h
+++ b/swRTC.h
@@ -63,8 +63,7 @@
 #endif
 
 //RTC module is preset in: ATMEGA8, ATMEGAx44, ATMEGAx8, ATMEGAx0
-//RTC is NOT in: ATTINYx4, ATTINYx5, ATTINYx313
-//Not sure on: ATMEGA32u4 
+//RTC is NOT in: ATTINYx4, ATTINYx5, ATTINYx313, ATMEGA32u4
 #if defined (USE_INTERNAL_RTC)
 #if defined (ATTINYx4) || defined (ATTINYx313) || defined (ATTINYx5) || defined(ATMEGAxU)
 #error This MCU does NOT have the RTC module
diff --git a/version.txt b/version.txt
index 7e099ec..a77d7d9 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.2.6
\ No newline at end of file
+1.2.7
\ No newline at end of file