diff --git a/PKG-INFO b/PKG-INFO
index 1c46a76..5686739 100644
--- a/PKG-INFO
+++ b/PKG-INFO
@@ -1,10 +1,10 @@
 Metadata-Version: 1.0
 Name: swh.model
-Version: 0.0.16
+Version: 0.0.17
 Summary: Software Heritage data model
 Home-page: https://forge.softwareheritage.org/diffusion/DMOD/
 Author: Software Heritage developers
 Author-email: swh-devel@inria.fr
 License: UNKNOWN
 Description: UNKNOWN
 Platform: UNKNOWN
diff --git a/debian/control b/debian/control
index 3e7fc44..f85b0fa 100644
--- a/debian/control
+++ b/debian/control
@@ -1,18 +1,18 @@
 Source: swh-model
 Maintainer: Software Heritage developers <swh-devel@inria.fr>
 Section: python
 Priority: optional
 Build-Depends: debhelper (>= 9),
                dh-python,
                python3-all,
                python3-nose,
                python3-setuptools,
-               python3-pyblake2,
+               python3 (>= 3.5) | python3-pyblake2,
                python3-vcversioner
 Standards-Version: 3.9.6
 Homepage: https://forge.softwareheritage.org/diffusion/DMOD/
 
 Package: python3-swh.model
 Architecture: all
 Depends: ${misc:Depends}, ${python3:Depends}
 Description: Software Heritage data model
diff --git a/requirements-swh.txt b/requirements-swh.txt
index fbe63bd..e69de29 100644
--- a/requirements-swh.txt
+++ b/requirements-swh.txt
@@ -1 +0,0 @@
-pyblake2
diff --git a/setup.py b/setup.py
index a520dc0..793b8e7 100644
--- a/setup.py
+++ b/setup.py
@@ -1,31 +1,37 @@
+import sys
+
 from setuptools import setup
 
 
 def parse_requirements():
     requirements = []
     for reqf in ('requirements.txt', 'requirements-swh.txt'):
         with open(reqf) as f:
             for line in f.readlines():
                 line = line.strip()
                 if not line or line.startswith('#'):
                     continue
                 requirements.append(line)
     return requirements
 
 
+extra_requirements = []
+if sys.version_info < (3, 5):
+    extra_requirements = ['pyblake2']
+
 setup(
     name='swh.model',
     description='Software Heritage data model',
     author='Software Heritage developers',
     author_email='swh-devel@inria.fr',
     url='https://forge.softwareheritage.org/diffusion/DMOD/',
     packages=[
         'swh.model', 'swh.model.fields',
         'swh.model.tests', 'swh.model.tests.fields',
     ],  # packages's modules
     scripts=[],   # scripts to package
-    install_requires=parse_requirements(),
+    install_requires=parse_requirements() + extra_requirements,
     setup_requires=['vcversioner'],
     vcversioner={},
     include_package_data=True,
 )
diff --git a/swh.model.egg-info/PKG-INFO b/swh.model.egg-info/PKG-INFO
index 1c46a76..5686739 100644
--- a/swh.model.egg-info/PKG-INFO
+++ b/swh.model.egg-info/PKG-INFO
@@ -1,10 +1,10 @@
 Metadata-Version: 1.0
 Name: swh.model
-Version: 0.0.16
+Version: 0.0.17
 Summary: Software Heritage data model
 Home-page: https://forge.softwareheritage.org/diffusion/DMOD/
 Author: Software Heritage developers
 Author-email: swh-devel@inria.fr
 License: UNKNOWN
 Description: UNKNOWN
 Platform: UNKNOWN
diff --git a/swh.model.egg-info/requires.txt b/swh.model.egg-info/requires.txt
index 77d4685..39a323a 100644
--- a/swh.model.egg-info/requires.txt
+++ b/swh.model.egg-info/requires.txt
@@ -1,2 +1 @@
-pyblake2
 vcversioner
diff --git a/version.txt b/version.txt
index bbf69d8..155f917 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-v0.0.16-0-g6f89adf
\ No newline at end of file
+v0.0.17-0-g11de644
\ No newline at end of file