diff --git a/NEWS.rst b/NEWS.rst
index 17ccaef..e4f6313 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -1,3 +1,8 @@
+0.4.0 (2020-07-18):
+ * Drop support for Python 2.x
+ * Fix memory issues in `play()`, `rec()` and `playrec()`
+ * Example application ``play_stream.py``
+
 0.3.15 (2020-03-18):
  * This will be the last release supporting Python 2.x!
 
diff --git a/sounddevice.py b/sounddevice.py
index 233ccbd..26b3625 100644
--- a/sounddevice.py
+++ b/sounddevice.py
@@ -48,7 +48,7 @@
     https://python-sounddevice.readthedocs.io/
 
 """
-__version__ = '0.3.15'
+__version__ = '0.4.0'
 
 import atexit as _atexit
 import os as _os