diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 5ffd5ec..ba68c44 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,12 @@
 SPDIF library change log
 ========================
 
+4.0.1
+-----
+
+  * CHANGED: Pin Python package versions
+  * REMOVED: not necessary cpanfile
+
 4.0.0
 -----
 
diff --git a/Jenkinsfile b/Jenkinsfile
index ef0fa6c..0164d2b 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -1,4 +1,4 @@
-@Library('xmos_jenkins_shared_library@develop') _
+@Library('xmos_jenkins_shared_library@v0.14.2') _
 
 getApproval()
 
diff --git a/Pipfile b/Pipfile
deleted file mode 100644
index 6d52bfd..0000000
--- a/Pipfile
+++ /dev/null
@@ -1,7 +0,0 @@
-[[source]]
-name = "pypi"
-url = "https://pypi.org/simple"
-verify_ssl = true
-
-[dev-packages]
-flake8 = "*"
diff --git a/cpanfile b/cpanfile
deleted file mode 100644
index 071f5e6..0000000
--- a/cpanfile
+++ /dev/null
@@ -1,2 +0,0 @@
-requires 'File::Copy::Recursive';
-requires 'LWP::Simple'
diff --git a/lib_spdif/LICENSE.txt b/lib_spdif/LICENSE.txt
index 63570e3..87cd08a 100644
--- a/lib_spdif/LICENSE.txt
+++ b/lib_spdif/LICENSE.txt
@@ -1,6 +1,6 @@
 Software Release License Agreement
 
-Copyright (c) 2014-2019, XMOS, All rights reserved.
+Copyright (c) 2014-2020, XMOS, All rights reserved.
 
 BY ACCESSING, USING, INSTALLING OR DOWNLOADING THE XMOS SOFTWARE, YOU AGREE TO BE BOUND BY THE FOLLOWING TERMS. IF YOU DO NOT AGREE TO THESE, DO NOT ATTEMPT TO DOWNLOAD, ACCESS OR USE THE XMOS Software.
 
diff --git a/lib_spdif/module_build_info b/lib_spdif/module_build_info
index d4fbd16..7c091bf 100644
--- a/lib_spdif/module_build_info
+++ b/lib_spdif/module_build_info
@@ -1,4 +1,4 @@
-VERSION = 4.0.0
+VERSION = 4.0.1
 
 DEPENDENT_MODULES =
 
diff --git a/python/setup.py b/python/setup.py
new file mode 100644
index 0000000..7d8be8c
--- /dev/null
+++ b/python/setup.py
@@ -0,0 +1,19 @@
+# Copyright (c) 2020, XMOS Ltd, All rights reserved
+import setuptools
+
+# Another repository might depend on python code defined in this one.  The
+# procedure to set up a suitable python environment for that repository may
+# pip-install this one as editable using this setup.py file.  To minimise the
+# chance of version conflicts while ensuring a minimal degree of conformity,
+# the 3rd-party modules listed here require the same major version and at
+# least the same minor version as specified in the requirements.txt file.
+# The same modules should appear in the requirements.txt file as given below.
+setuptools.setup(
+    name='lib_spdif',
+    packages=setuptools.find_packages(),
+    install_requires=[
+        'flake8~=3.8',
+    ],
+    dependency_links=[
+    ],
+)
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..99e7dd7
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,34 @@
+# python_version 3.7.6
+#
+# The parse_version_from_requirements() function in the installPipfile.groovy
+# file of the Jenkins Shared Library uses the python_version comment to set
+# the version of python used.
+
+# Distributed (released) dependencies
+#
+# The python modules listed below specify a known working combination required
+# by the python code in this repository.  The procedure used to set up a
+# suitable python environment for it installs the version of each module in
+# the list.  Using a specific version ensures a controlled infrastructure for
+# development, testing and release of this repository.
+#
+# Another repository might depend on python code defined in this one.  The
+# procedure to set up a suitable python environment for that repository may
+# pip-install this one as editable using this repository's setup.py file.  The
+# same modules should appear in the setup.py list as given below.
+
+flake8==3.8.3
+
+# Development dependencies
+#
+# Each link listed below specifies the path to a setup.py file which are
+# installed in editable mode with '-e $PATH' (without the quotes).
+#
+# If python code in this repository depends on python code under development
+# in another repository, then an entry for that other respository should
+# appear in this list instead of the released dependencies list.
+#
+# If this repository uses the setup functionality (e.g., script entry points)
+# of its own setup.py file, then this list must include an entry for that
+# setup.py file, e.g., '-e .' or '-e ./python' (without the quotes).
+-e ./python