diff --git a/mikeio/__init__.py b/mikeio/__init__.py
index dfd552080..ae3a2cf4a 100644
--- a/mikeio/__init__.py
+++ b/mikeio/__init__.py
@@ -21,7 +21,7 @@
 # 'X.Y.dev0' is the canonical version of 'X.Y.dev'
 #
 
-__version__ = "2.0.0"  # TODO use git hash instead for dev version?
+__version__ = "2.1.dev0"  # TODO use git hash instead for dev version?
 # __version__ = "1.5.0"
 __dfs_version__: int = 200
 
diff --git a/pyproject.toml b/pyproject.toml
index 6c4c94d63..7d8e6cd92 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ allow-direct-references = true
 
 [project]
 name="mikeio"
-version="2.0.0"
+version="2.1.dev0"
 dependencies = [
     "mikecore>=0.2.1",
     "numpy>=1.22.0",