diff --git a/aiidalab_widgets_base/__init__.py b/aiidalab_widgets_base/__init__.py
index 9a9113257..50ec5b132 100644
--- a/aiidalab_widgets_base/__init__.py
+++ b/aiidalab_widgets_base/__init__.py
@@ -116,4 +116,4 @@ def is_running_in_jupyter():
     "viewer",
 ]
 
-__version__ = "2.1.0"
+__version__ = "2.2.0a0"
diff --git a/setup.cfg b/setup.cfg
index c7b3f590d..ada0dd703 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -67,7 +67,7 @@ docs =
     myst-nb
 
 [bumpver]
-current_version = "v2.1.0"
+current_version = "v2.2.0a0"
 version_pattern = "vMAJOR.MINOR.PATCH[PYTAGNUM]"
 commit_message = "Bump version {old_version} -> {new_version}"
 commit = True