diff --git a/python/obitools3/version.py b/python/obitools3/version.py
index 0d94f79..29ebc1c 100755
--- a/python/obitools3/version.py
+++ b/python/obitools3/version.py
@@ -1,5 +1,5 @@
 major = 3
 minor = 0
-serial= '0-beta17'
+serial= '0b18'
 
-version ="%d.%02d.%s" % (major,minor,serial)
+version ="%d.%d.%s" % (major,minor,serial)