diff --git a/CHANGES b/CHANGES
index bd4d0cc..6f2516a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,4 +1,4 @@
-Since version 1.6:
+Version 1.6.1: 2016-02-22
   - New: Option for PCA initialization is added to the Python interface.
   - New: Clustering of the codebook with arbitrary clustering algorithm in scikit-learn is now possible in the Python interface.
 
diff --git a/configure.ac b/configure.ac
index 26146e0..ca7ccdc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.61])
-AC_INIT([Somoclu], [1.6])
+AC_INIT([Somoclu], [1.6.1])
 m4_include([m4/ax_mpi_options.m4])
 m4_include([m4/ax_mpi_tests.m4])
 AC_CONFIG_SRCDIR([src/somoclu.h])
diff --git a/src/MATLAB/README.rst b/src/MATLAB/README.rst
index a468d6a..8d5edee 100644
--- a/src/MATLAB/README.rst
+++ b/src/MATLAB/README.rst
@@ -1,4 +1,4 @@
-Version: 1.6
+Version: 1.6.1
 
 Maintainer: ShichaoGao<xgdgsc at gmail.com>
 
diff --git a/src/Python/doc/source/conf.py b/src/Python/doc/source/conf.py
index 94c0c22..4b46dbb 100644
--- a/src/Python/doc/source/conf.py
+++ b/src/Python/doc/source/conf.py
@@ -63,9 +63,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '1.6'
+version = '1.6.1'
 # The full version, including alpha/beta/rc tags.
-release = '1.6'
+release = '1.6.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/src/Python/setup.py b/src/Python/setup.py
index 8e09349..14c39c5 100644
--- a/src/Python/setup.py
+++ b/src/Python/setup.py
@@ -147,7 +147,7 @@ def build_extensions(self):
 
 try:
     setup(name='somoclu',
-          version='1.6',
+          version='1.6.1',
           license='GPL3',
           author="Peter Wittek, Shi Chao Gao",
           author_email="",
@@ -174,7 +174,7 @@ def build_extensions(self):
 except:
     traceback.print_exc()
     setup(name='somoclu',
-          version='1.6',
+          version='1.6.1',
           license='GPL3',
           author="Peter Wittek, Shi Chao Gao",
           author_email="",
diff --git a/src/R/DESCRIPTION b/src/R/DESCRIPTION
index 4cef89a..f6f5bdb 100644
--- a/src/R/DESCRIPTION
+++ b/src/R/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: Rsomoclu
-Version: 1.6
-Date: 2016-01-08
+Version: 1.6.1
+Date: 2016-02-22
 Title: Somoclu
 Depends: Rcpp
 Imports: kohonen, class