diff --git a/nc_py_api/_version.py b/nc_py_api/_version.py
index 35f22e02..dfc9b7cc 100644
--- a/nc_py_api/_version.py
+++ b/nc_py_api/_version.py
@@ -1,3 +1,3 @@
 """Version of nc_py_api."""
 
-__version__ = "0.20.0"
+__version__ = "0.20.1.dev0"
diff --git a/pyproject.toml b/pyproject.toml
index d472cf9a..9da6f9f2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -104,9 +104,6 @@ exclude = [
 
 [tool.black]
 line-length = 120
-target-versions = [
-  "py310",
-]
 preview = true
 
 [tool.ruff]