diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index cc98bb8..63c49e6 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.6.3
+current_version = 0.6.4
 commit = True
 tag = True
 
diff --git a/docs/conf.py b/docs/conf.py
index eace08b..fd55eda 100755
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -113,7 +113,7 @@
 # the built documents.
 #
 # The short X.Y version.
-version = '0.6.3'
+version = '0.6.4'
 # The full version, including alpha/beta/rc tags.
 release = version
 
diff --git a/version.txt b/version.txt
index 844f6a9..d2b13eb 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-0.6.3
+0.6.4