diff --git a/docs/changelog.rst b/docs/changelog.rst
index 247e79fb4..c6ea85130 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -2,6 +2,14 @@ Changelog
 =========
 
 
+v2.15.1 - 2020-01-25
+
+- [`#850 <https://github.com/dennissiemensma/dsmr-reader/issues/850>`_] No matching distribution found for PyCRC==1.21
+
+
+----
+
+
 .. warning::
 
     *This is the last release of DSMR-reader ``v2.x``. New features will only be added to ``v3.x``. See `the v3 upgrade guide <https://dsmr-reader.readthedocs.io/en/v3/faq/v3_upgrade.html>`_ for more information.*
diff --git a/dsmrreader/__init__.py b/dsmrreader/__init__.py
index 7577acc3d..48b08712b 100644
--- a/dsmrreader/__init__.py
+++ b/dsmrreader/__init__.py
@@ -1,5 +1,5 @@
 from django.utils.version import get_version
 
-VERSION = (2, 15, 0, 'final', 0)
+VERSION = (2, 15, 1, 'final', 0)
 
 __version__ = get_version(VERSION)
diff --git a/dsmrreader/provisioning/packages/PyCRC-1.21.tar.gz b/dsmrreader/provisioning/packages/PyCRC-1.21.tar.gz
new file mode 100644
index 000000000..de34bfbef
Binary files /dev/null and b/dsmrreader/provisioning/packages/PyCRC-1.21.tar.gz differ
diff --git a/dsmrreader/provisioning/requirements/base.txt b/dsmrreader/provisioning/requirements/base.txt
index 8f2a4b383..6cf600c7a 100644
--- a/dsmrreader/provisioning/requirements/base.txt
+++ b/dsmrreader/provisioning/requirements/base.txt
@@ -10,9 +10,11 @@ dropbox==9.4.0
 # Do not upgrade to 20.x yet, see #783
 gunicorn==19.7
 paho-mqtt==1.5.0
-PyCRC==1.21
 pyserial==3.4
 python-dateutil==2.8.1
 pytz==2019.3
 requests==2.22.0
 urllib3==1.25.7
+
+# See #850, it seems pyCRC has been replaced?! And the old repository is no longer available.
+https://qpypi3.qpython.org/repository/1745924/PyCRC-1.21.tar.gz
\ No newline at end of file