diff --git a/.travis.yml b/.travis.yml
index 8c1c13eb..2481d0f8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,17 +28,29 @@ language: python
 cache:
   - pip
 
-env:
-  - REQUIREMENTS=lowest EXTRAS=all
-  - REQUIREMENTS=release EXTRAS=all
-  - REQUIREMENTS=devel EXTRAS=all
-
 matrix:
   fast_finish: true
   include:
     - python: 2.7
+      env: REQUIREMENTS=devel EXTRAS=all
+    - python: 2.7
+      env: REQUIREMENTS=lowest EXTRAS=all
+    - python: 2.7
+      env: REQUIREMENTS=release EXTRAS=all
+    - python: 3.6
+      env: REQUIREMENTS=devel EXTRAS=all
+    - python: 3.6
+      env: REQUIREMENTS=lowest EXTRAS=all
     - python: 3.6
+      env: REQUIREMENTS=release EXTRAS=all
+    - python: 3.7
+      env: REQUIREMENTS=devel EXTRAS=all
+      dist: xenial
+    - python: 3.7
+      env: REQUIREMENTS=lowest EXTRAS=all
+      dist: xenial
     - python: 3.7
+      env: REQUIREMENTS=release EXTRAS=all
       dist: xenial
 
 before_install:
diff --git a/AUTHORS.rst b/AUTHORS.rst
index 439517f7..f132dfb0 100644
--- a/AUTHORS.rst
+++ b/AUTHORS.rst
@@ -3,8 +3,8 @@ Authors
 
 The list of contributors in alphabetical order:
 
-- `Anton Khodak <https://orcid.org/0000-0003-3263-4553>`_ <anton.khodak@ukr.net>
-- `Diego Rodriguez <https://orcid.org/0000-0003-0649-2002>`_ <diego.rodriguez@cern.ch>
-- `Dinos Kousidis <https://orcid.org/0000-0002-4914-4289>`_ <dinos.kousidis@cern.ch>
-- `Harri Hirvonsalo <https://orcid.org/0000-0002-5503-510X>`_ <harri.hirvonsalo@cern.ch>
-- `Tibor Simko <https://orcid.org/0000-0001-7202-5803>`_ <tibor.simko@cern.ch>
+- `Anton Khodak <https://orcid.org/0000-0003-3263-4553>`_
+- `Diego Rodriguez <https://orcid.org/0000-0003-0649-2002>`_
+- `Dinos Kousidis <https://orcid.org/0000-0002-4914-4289>`_
+- `Harri Hirvonsalo <https://orcid.org/0000-0002-5503-510X>`_
+- `Tibor Simko <https://orcid.org/0000-0001-7202-5803>`_
diff --git a/CHANGES.rst b/CHANGES.rst
index b2e46bc4..e7e14e12 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,16 @@
 Changes
 =======
 
+Version 0.3.1 (2018-09-25)
+--------------------------
+
+* Amends upload and download commands that will now upload/download all the
+  files specified in ``reana.yaml`` in case no arguments are provided.
+* Fixes ``status`` command's JSON output mode.
+* Upgrades CWL reference implementation to version ``1.0.20180912090223``.
+* Renames Serial workflow operational parameter from ``CACHING``to ``CACHE``.
+* Adds support for Python 3.7.
+
 Version 0.3.0 (2018-08-10)
 --------------------------
 
@@ -20,7 +30,6 @@ Version 0.3.0 (2018-08-10)
   serial workflows.
 - Improves error messages.
 
-
 Version 0.2.0 (2018-04-20)
 --------------------------
 
diff --git a/README.rst b/README.rst
index 2abffef6..0961be30 100644
--- a/README.rst
+++ b/README.rst
@@ -2,20 +2,17 @@
  REANA-Client
 ==============
 
-.. image:: https://img.shields.io/travis/reanahub/reana-client.svg
-   :target: https://travis-ci.org/reanahub/reana-client
-
 .. image:: https://img.shields.io/pypi/pyversions/reana-client.svg
    :target: https://pypi.org/pypi/reana-client
 
-.. image:: https://img.shields.io/coveralls/reanahub/reana-client.svg
-   :target: https://coveralls.io/r/reanahub/reana-client
+.. image:: https://img.shields.io/travis/reanahub/reana-client.svg
+   :target: https://travis-ci.org/reanahub/reana-client
 
 .. image:: https://readthedocs.org/projects/docs/badge/?version=latest
    :target: https://reana-client.readthedocs.io/en/latest/?badge=latest
 
-.. image:: https://badge.waffle.io/reanahub/reana.svg?label=Status%3A%20ready%20for%20work&title=Issues%20ready%20for%20work
-   :target: https://waffle.io/reanahub/reana
+.. image:: https://img.shields.io/coveralls/reanahub/reana-client.svg
+   :target: https://coveralls.io/r/reanahub/reana-client
 
 .. image:: https://badges.gitter.im/Join%20Chat.svg
    :target: https://gitter.im/reanahub/reana?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge
diff --git a/reana_client/version.py b/reana_client/version.py
index 36521faf..909845fa 100644
--- a/reana_client/version.py
+++ b/reana_client/version.py
@@ -28,4 +28,4 @@
 
 from __future__ import absolute_import, print_function
 
-__version__ = "0.3.1.dev20180905"
+__version__ = "0.3.1"
diff --git a/setup.py b/setup.py
index 89055788..79af2bab 100644
--- a/setup.py
+++ b/setup.py
@@ -35,7 +35,7 @@
 tests_require = [
     'check-manifest>=0.25',
     'coverage>=4.0',
-    'docutils==0.12',
+    'docutils>=0.14',
     'httpretty>=0.8',
     'isort>=4.2.2',
     'pydocstyle>=1.0.0',
@@ -47,7 +47,7 @@
 
 extras_require = {
     'docs': [
-        'Sphinx>=1.4.4',
+        'Sphinx>=1.5.1',
         'sphinx-rtd-theme>=0.1.9',
         'sphinx-click>=1.0.4',
     ],