diff --git a/gstools/_version.py b/gstools/_version.py
index 5bba69b0..17f6cd29 100644
--- a/gstools/_version.py
+++ b/gstools/_version.py
@@ -1,2 +1,2 @@
 """Provide a central version."""
-__version__ = "1.1.0"
+__version__ = "1.1.1.dev0"