diff --git a/build/shared/revisions.txt b/build/shared/revisions.txt
index 062d9893d..2c11e40b3 100644
--- a/build/shared/revisions.txt
+++ b/build/shared/revisions.txt
@@ -1,5 +1,5 @@
 
-ARDUINO 1.5.5 BETA
+ARDUINO 1.5.5 BETA 2013.11.28
 
 NOTICE:
 The 1.5 library format is under heavy review on the Arduino Developers mailing list.
diff --git a/hardware/arduino/avr/platform.txt b/hardware/arduino/avr/platform.txt
index 8deb40cea..4e28f0a38 100644
--- a/hardware/arduino/avr/platform.txt
+++ b/hardware/arduino/avr/platform.txt
@@ -6,7 +6,7 @@
 # https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5---3rd-party-Hardware-specification
 
 name=Arduino AVR Boards
-version=1.5.4
+version=1.5.5
 
 # AVR compile variables
 # --------------------- 
diff --git a/hardware/arduino/sam/platform.txt b/hardware/arduino/sam/platform.txt
index 5c5ffd272..b62d51c4c 100644
--- a/hardware/arduino/sam/platform.txt
+++ b/hardware/arduino/sam/platform.txt
@@ -5,7 +5,7 @@
 # https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5---3rd-party-Hardware-specification
 
 name=Arduino ARM (32-bits) Boards
-version=1.5.4
+version=1.5.5
 
 # SAM3 compile variables
 # ----------------------