diff --git a/.appveyor.yml b/.appveyor.yml
index a68f4c2b4..a4c5b31c3 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -1,4 +1,4 @@
-version: 0.6.5.{build}
+version: 0.6.6.{build}
 os: Windows Server 2012 R2
 environment:
 
diff --git a/xonsh/__init__.py b/xonsh/__init__.py
index c0e903790..bcefc089d 100644
--- a/xonsh/__init__.py
+++ b/xonsh/__init__.py
@@ -1,4 +1,4 @@
-__version__ = '0.6.5'
+__version__ = '0.6.6'
 
 
 # amalgamate exclude jupyter_kernel parser_table parser_test_table pyghooks