diff --git a/setup.py b/setup.py
index 2aa9fc7..d122fa9 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 
 setup(
     name="kaldiio",
-    version="2.15.1",
+    version="2.16.0a1",
     description="Kaldi-ark loading and writing module",
     author="nttcslab-sp",
     # author_email='',