diff --git a/CHANGELOG.md b/CHANGELOG.md
index 02e8996c..a1c50e42 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,16 @@
 
 Records breaking changes from major version bumps
 
+## 31.0.0
+
+PR: [#343](https://github.com/alphagov/digitalmarketplace-utils/pull/343)
+
+Major version bump because we require users of this library to upgrade
+to a version of the odfpy that is not in pypi.
+
+ACTION: update your `requirements-app.txt`, copying the github URI in this
+repo's `requirements.txt`.
+
 ## 30.0.0
 
 PR: [#341](https://github.com/alphagov/digitalmarketplace-utils/pull/341)
diff --git a/dmutils/__init__.py b/dmutils/__init__.py
index e9e2e9e4..5e497584 100644
--- a/dmutils/__init__.py
+++ b/dmutils/__init__.py
@@ -4,4 +4,4 @@
 import flask_featureflags  # noqa
 
 
-__version__ = '30.0.0'
+__version__ = '31.0.0'
diff --git a/requirements.txt b/requirements.txt
index ecf975e2..c1c4c11a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,2 @@
--e .
\ No newline at end of file
+git+https://github.com/alphagov/odfpy.git@ee4482a#egg=odfpy==1.3.6dev
+-e .
diff --git a/setup.py b/setup.py
index 5041f1bb..41306ad4 100644
--- a/setup.py
+++ b/setup.py
@@ -35,7 +35,7 @@
          'mandrill==1.0.57',
          'monotonic==0.3',
          'notifications-python-client==4.1.0',
-         'odfpy==1.3.3',
+         'odfpy==1.3.6dev',
          'python-json-logger==0.1.4',
          'pytz==2015.4',
          'pyyaml==3.11',