diff --git a/CHANGES.rst b/CHANGES.rst
index 45916a8..0715c4c 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -6,7 +6,7 @@ Version 1.6.0
 * swarm updated to version 2.1.12;
 * Now the mergepairs command allows merging staggered reads by default.
   With the new option ``-n/--nostagger`` the command produces the same 
-  results of the previous versions (<=1.5.0);
+  results of the previous versions (<=1.5);
 * classify and tabletotax commands  now strip the ``D_X__`` prefix from the Silva 
   taxonomy files;
 * Documentation updated;
diff --git a/README.rst b/README.rst
index 5177486..6287576 100644
--- a/README.rst
+++ b/README.rst
@@ -20,13 +20,12 @@ software.
 Key features:
 
 * supports **single-end** (Roche 454, Illumina MiSeq/HiSeq ,Ion
-  Torren) as well **overlapping paired-end** reads (Illumina MiSeq/HiSeq);
-* **multithread** de novo greedy clustering
-* **closed-reference**, **open-reference** and **swarm** OTU picking protocols;
-* **state-of-the-art taxonomic classification** algorithms are
-  available (RDP and consensus-based classifier);
-* fast (multithread) and and memory efficient implementation of the
-  **NAST** multiple sequence alignment (MSA);
+  Torrent) and **overlapping paired-end** reads (Illumina MiSeq/HiSeq);
+* **multithread** de novo greedy, closed-reference, open-reference and swarm OTU
+  picking protocols;
+* **state-of-the-art taxonomic classification** algorithms (RDP and 
+  consensus-based classifier);
+* fast and and memory efficient **NAST** multiple sequence alignment (MSA);
 * filters low quality sequences according to the maximum allowed **expected
   error (EE) rate** %;
 * runs on **Linux**, **Mac OS X** and **MS Windows** (through Docker
@@ -52,5 +51,5 @@ cited** if they are used:
 * MUSCLE (doi: 10.1093/nar/gkh340) used in ``msa`` and ``tree`` commands
 * FastTree (doi: 10.1371/journal.pone.0009490) used in the ``tree`` command
 * Cutadapt (doi: 10.14806/ej.17.1.200) used in the ``trim`` command
-* RDP classifier (doi:10.1128/AEM.00062-07) used in the ``classify`` command
-* swarm (10.7717/peerj.593, doi: 10.7717/peerj.1420) used in the ``otu`` command
+* RDP classifier (doi: 10.1128/AEM.00062-07) used in the ``classify`` command
+* swarm (doi: 10.7717/peerj.1420) used in the ``otu`` command
diff --git a/micca/__init__.py b/micca/__init__.py
index 2ede160..2356b24 100644
--- a/micca/__init__.py
+++ b/micca/__init__.py
@@ -1,5 +1,21 @@
 import os
 
-__version__ = "1.6.0"
+# PEP0440 compatible formatted version, see:
+# https://www.python.org/dev/peps/pep-0440/
+#
+# Generic release markers:
+#   X.Y
+#   X.Y.Z   # For bugfix releases
+#
+# Admissible pre-release markers:
+#   X.YaN   # Alpha release
+#   X.YbN   # Beta release
+#   X.YrcN  # Release Candidate
+#   X.Y     # Final release
+#
+# Dev branch marker is: 'X.Y.dev' or 'X.Y.devN' where N is an integer.
+# 'X.Y.dev0' is the canonical version of 'X.Y.dev'
+#
+__version__ = "1.6"
 
 THIRDPARTY_BIN_PATH = os.path.join(os.path.dirname(__file__), "thirdparty_bin")