diff --git a/README.md b/README.md
index 136a2ac11cfb0d016abae83b7bc05a2296dec340..64095badc000a302ca2f370d8fa02224406b392f 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,10 @@ Consult the docs for how to disable it.
 
 # Changelog
 
+## v0.6.5
+
+* _TBA_
+
 ## v0.6.4
 
 * fixed a bug with slicing chunks in `VarlenSeries`
diff --git a/setup.cfg b/setup.cfg
index 025404d15fcf71acc2370056b61778f9e7fe8d21..9824331a8e3dbd1323394a3e4fcc73359a1ec65f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,7 +1,7 @@
 # coding: utf-8
 [metadata]
 name = tempsdb
-version = 0.6.4
+version = 0.6.5a1
 long-description = file: README.md
 long-description-content-type = text/markdown; charset=UTF-8
 license_files = LICENSE