diff --git a/LICENSE.rst b/LICENSE.rst
new file mode 100644
index 0000000..475ec73
--- /dev/null
+++ b/LICENSE.rst
@@ -0,0 +1,29 @@
+BSD 3-Clause License
+
+Copyright (c) 2017, Smithsonian Astrophysical Observatory
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of the copyright holder nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/Ska/__init__.py b/Ska/__init__.py
index bb61062..46d8fff 100644
--- a/Ska/__init__.py
+++ b/Ska/__init__.py
@@ -1,2 +1,3 @@
+# Licensed under a 3-clause BSD style license - see LICENSE.rst
 import pkgutil
 __path__ = pkgutil.extend_path(__path__, __name__)
diff --git a/Ska/ftp/__init__.py b/Ska/ftp/__init__.py
index 0718d39..9158326 100644
--- a/Ska/ftp/__init__.py
+++ b/Ska/ftp/__init__.py
@@ -1,3 +1,4 @@
+# Licensed under a 3-clause BSD style license - see LICENSE.rst
 from .ftp import *
 
 __version__ = '3.5'
diff --git a/Ska/ftp/ftp.py b/Ska/ftp/ftp.py
index 91c8c87..ba9e844 100644
--- a/Ska/ftp/ftp.py
+++ b/Ska/ftp/ftp.py
@@ -1,3 +1,4 @@
+# Licensed under a 3-clause BSD style license - see LICENSE.rst
 """
 Light wrapper around Python ftplib to make it easier to use.  Just adds a few
 convenience methods to ftplib.FTP class: ls(), ls_full(), put(), get(), and cd().
diff --git a/Ska/ftp/tests/test_basic.py b/Ska/ftp/tests/test_basic.py
index a8eb074..8ea0daf 100644
--- a/Ska/ftp/tests/test_basic.py
+++ b/Ska/ftp/tests/test_basic.py
@@ -1,3 +1,4 @@
+# Licensed under a 3-clause BSD style license - see LICENSE.rst
 import uuid
 import os
 import sys
diff --git a/Ska/ftp/tests/test_tar.py b/Ska/ftp/tests/test_tar.py
index af3b194..dc99e89 100644
--- a/Ska/ftp/tests/test_tar.py
+++ b/Ska/ftp/tests/test_tar.py
@@ -1,3 +1,4 @@
+# Licensed under a 3-clause BSD style license - see LICENSE.rst
 import os
 import Ska.ftp
 import tarfile
diff --git a/setup.py b/setup.py
index b6b0f7f..f1d3b03 100755
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,4 @@
+# Licensed under a 3-clause BSD style license - see LICENSE.rst
 from setuptools import setup
 
 from Ska.ftp import __version__