diff --git a/new-release.py b/new-release.py
index c7bb70b..5c0a778 100755
--- a/new-release.py
+++ b/new-release.py
@@ -77,7 +77,8 @@ def get_last_version():
 
 
 def inc_version(v, feature=False):
-  if v == "0.":
+  if v.startswith("v0."):
+    assert v == "v0.14.6"
     return "15.0"
   # v4.11 -> v4.12 or v5.0
   parts = v.split(".")