diff --git a/pymars/_version.py b/pymars/_version.py
index c2d3ddc..2960237 100644
--- a/pymars/_version.py
+++ b/pymars/_version.py
@@ -1,4 +1,4 @@
-__version_info__ = (0, 1, 0, 'a0')
+__version_info__ = (0, 0, 9, 'a0')
 __version__ = '.'.join(map(str, __version_info__[:3]))
 if len(__version_info__) == 4:
     __version__ += __version_info__[-1]