diff --git a/CHANGELOG.md b/CHANGELOG.md
index 116977a3..03099b39 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Change Log
 
+## 0.13.1 - 2021-10-04
+
+✨ NEW: `nb_merge_streams` configuration  [[PR #364](https://github.com/executablebooks/MyST-NB/pull/364)]
+
+If `nb_merge_streams=True`, all stdout / stderr output streams are merged into single outputs. This ensures deterministic outputs.
+
 ## 0.13.0 - 2021-09-02
 
 ### Upgraded to `sphinx` v4 ⬆️
diff --git a/myst_nb/__init__.py b/myst_nb/__init__.py
index 1b9c79e7..df572913 100644
--- a/myst_nb/__init__.py
+++ b/myst_nb/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "0.13.0"
+__version__ = "0.13.1"
 
 import os
 from collections.abc import Sequence