diff --git a/NEWS b/NEWS
index b5d87dce..b2ebd26c 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,6 @@
+1.3.6.dev0
+ * Remove Python cache files before each Tox run.
+
 1.3.5
  * #153: Support for various Borg directory environment variables (BORG_CONFIG_DIR, BORG_CACHE_DIR,
    etc.) via options in borgmatic's storage configuration.
diff --git a/setup.py b/setup.py
index cdeb11ad..4361fc14 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,6 @@
 from setuptools import find_packages, setup
 
-VERSION = '1.3.5'
+VERSION = '1.3.6.dev0'
 
 
 setup(