diff --git a/mchf-eclipse/hardware/mchf_board.h b/mchf-eclipse/hardware/mchf_board.h
index cd25e9d06..850874c42 100644
--- a/mchf-eclipse/hardware/mchf_board.h
+++ b/mchf-eclipse/hardware/mchf_board.h
@@ -68,7 +68,7 @@
 //
 #define 	TRX4M_VER_MAJOR			1
 #define 	TRX4M_VER_MINOR			5
-#define 	TRX4M_VER_RELEASE		5
+#define 	TRX4M_VER_RELEASE		6
 //
 #define		ATTRIB_STRING1			"Additional Contributions by"
 #define		ATTRIB_STRING2			"KA7OEI, DF8OE and others."
diff --git a/mchf-eclipse/history.txt b/mchf-eclipse/history.txt
index 8f2f30ca4..1572bb8a4 100644
--- a/mchf-eclipse/history.txt
+++ b/mchf-eclipse/history.txt
@@ -12,6 +12,17 @@
 #########################################################################
 #########################################################################
 
+20161231 [DF8OE]
+- frequency translation +/- 12KHz uses now more efficient algorithm
+- plopping / klicking sound at PTT is removed
+- I2C Bus speed improved (storing time to serial EEPROM significantly
+  shorter now)
+- many minor bugfixes
+- reduced time for RX <--> TX switching
+- implementing a "menu manual" which is automatically created with every
+  new build - can be found in support/ui/menu and is published in
+  GitHub WIKI
+
 20161115 [DF8OE]
 - minor bugfixes
 - implementation of touchscreen for 3.2" LCDs
diff --git a/mchf-eclipse/versions.txt b/mchf-eclipse/versions.txt
index 3cf4f4d20..21a3ba5cf 100644
--- a/mchf-eclipse/versions.txt
+++ b/mchf-eclipse/versions.txt
@@ -1,2 +1,2 @@
 <bootloader testing> <firmware testing> <bootloader stable> <firmware stable>
-,---,1.5.3,2.0.0,1.4.0
\ No newline at end of file
+,---,1.5.6,2.0.0,1.4.0
\ No newline at end of file