bump up version to 0.9.10.dev1
diff --git a/predictionio/__init__.py b/predictionio/__init__.py
index a20f4cc..fcb649c 100644
--- a/predictionio/__init__.py
+++ b/predictionio/__init__.py
@@ -4,7 +4,7 @@
 """
 
 
-__version__ = "0.9.9"
+__version__ = "0.9.10.dev1"
 
 # import packages
 import re
diff --git a/setup.py b/setup.py
index 968a9e5..f697be5 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
 
 setup(
     name='PredictionIO',
-    version="0.9.9",
+    version="0.9.10.dev1",
     author=__author__,
     author_email=__email__,
     packages=['predictionio'],