diff --git a/Makefile b/Makefile
index 696a77ee8b..aa4c1b85e7 100644
--- a/Makefile
+++ b/Makefile
@@ -34,7 +34,7 @@ CCASFLAGS=$(CFLAGS)
 STATIC_LDFLAGS=-lstdc++
 
 VERSION=1.6
-SHAREDLIBVERSION=2
+SHAREDLIBVERSION=0
 
 ifeq (,$(wildcard $(SRC_PATH)gmp-api))
 HAVE_GMP_API=No
diff --git a/README.md b/README.md
index be585ba9ac..1c4c6ed1bf 100644
--- a/README.md
+++ b/README.md
@@ -4,12 +4,13 @@ OpenH264 is a codec library which supports H.264 encoding and decoding. It is su
 
 Encoder Features
 ----------------
-- Constrained Baseline Profile up to Level 5.2 (4096x2304)
+- Constrained Baseline Profile up to Level 5.2 (Max frame size is 36864 macro-blocks)
 - Arbitrary resolution, not constrained to multiples of 16x16
 - Rate control with adaptive quantization, or constant quantization
 - Slice options: 1 slice per frame, N slices per frame, N macroblocks per slice, or N bytes per slice
 - Multiple threads automatically used for multiple slices
 - Temporal scalability up to 4 layers in a dyadic hierarchy
+- Simulcast AVC up to 4 resolutions from a single input
 - Spatial simulcast up to 4 resolutions from a single input
 - Long Term Reference (LTR) frames
 - Memory Management Control Operation (MMCO)
diff --git a/RELEASES b/RELEASES
index 310a6dbbb0..ed05ac2ba6 100644
--- a/RELEASES
+++ b/RELEASES
@@ -1,6 +1,27 @@
 
 Releases
 -----------
+v1.6.0
+------
+- Adjusted the encoder API structures
+- Removed the unused data format in decoder API
+- Encoder support of simulcast AVC
+- Added support of video signal type present information
+- Added support of encoder load-balancing
+- Improved encoder multi-threads, rate control and down-sampling
+- Fixed the frame size constraint in encoder
+- Bug fixes for rate control, multi-threading, simulcasting in encoder
+- Bug fixes for interface call, return value check, memory leak in decoder
+- Bug fixes for UT and statistic information
+- Bug fixes for assembly code
+- Remove the unused and redundant code
+- Improvements on UT, memory allocation failed protection, error-protection in decoder, input parameters checking in encoder, assembly for AVX2 support, assembly code performance, logging and documentation
+- Correct some typos in source code and documents
+
+v1.5.3
+------
+- Bug fixes for GMP Plugin
+
 v1.5.2
 ------
 - Fix GMP Plugin causing the Browser crash on Android