diff --git a/pyerrors/version.py b/pyerrors/version.py
index 95a6d3a7..9b9dc340 100644
--- a/pyerrors/version.py
+++ b/pyerrors/version.py
@@ -1 +1 @@
-__version__ = "2.12.0"
+__version__ = "2.13.0-dev"