diff --git a/pyerrors/version.py b/pyerrors/version.py
index 7f6646a7..5f6c80fd 100644
--- a/pyerrors/version.py
+++ b/pyerrors/version.py
@@ -1 +1 @@
-__version__ = "2.11.0"
+__version__ = "2.12.0-dev"