diff --git a/cate/version.py b/cate/version.py
index d8ce4a0c5..90bf4df19 100644
--- a/cate/version.py
+++ b/cate/version.py
@@ -21,7 +21,7 @@
 # SOFTWARE.
 
 # Cate version string (PEP440-compatible), e.g. "0.8.0", "0.8.0.dev1", "0.8.0rc1", "0.8.0rc1.dev1"
-__version__ = '2.1.5'
+__version__ = '3.0.0.dev0'
 
 # Other package metainfo
 __title__ = 'cate'