diff --git a/Arduino.mk b/Arduino.mk
index e441026..0aa4701 100644
--- a/Arduino.mk
+++ b/Arduino.mk
@@ -19,7 +19,7 @@
 #
 # Original Arduino adaptation by mellis, eighthave, oli.keller
 #
-# Current version: 1.3.0
+# Current version: 1.3.1
 #
 # Refer to HISTORY.md file for complete history of changes
 #
diff --git a/HISTORY.md b/HISTORY.md
index 57dd078..41d5609 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -4,7 +4,7 @@ A Makefile for Arduino Sketches
 The following is the rough list of changes that went into different versions.
 I tried to give credit whenever possible. If I have missed anyone, kindly add it to the list.
 
-### 1.3.1 (2014-02-01)
+### 1.3.1 (2014-02-04)
 - Fix: BUNDLED_AVR_TOOLS_DIR is now set properly when using only arduino-core and not the whole arduino package. (https://github.com/sej7278)
 - New: Document all variables that can be overridden. (https://github.com/sej7278)
 - New: Add a new `help_vars` target to display information about variables that can be overridden.