diff --git a/fsl/utils/notifier.py b/fsl/utils/notifier.py
index f26d4141c5718f561e03670fef28afcf1877ec6a..185dd97408c1ec96a3da2f68812243e9721bbc69 100644
--- a/fsl/utils/notifier.py
+++ b/fsl/utils/notifier.py
@@ -78,8 +78,8 @@ class Notifier(object):
     *topic*, or be notified for all topics.
 
     .. note:: The ``Notifier`` class stores ``weakref`` references to
-              registered callback functions, using the :class:`WeakFunctionRef`
-              class, provided by the :mod:`props` package.
+              registered callback functions, using the
+              :class:`.WeakFunctionRef` class.
     """
 
 
diff --git a/requirements.txt b/requirements.txt
index 4391df5500347e75823b724452b4294ed7af9c4e..a3a37761aec3a4129560a4f44798707fd14d5460 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,4 +6,3 @@ nibabel>=2.1
 sphinx>=1.4.1
 sphinx-rtd-theme>=0.1.9
 indexed_gzip>=0.3.1
-git+ssh://git@git.fmrib.ox.ac.uk/paulmc/props.git#egg=props