diff --git a/aiidalab_widgets_base/__init__.py b/aiidalab_widgets_base/__init__.py
index 263cf62fd..83887f13b 100644
--- a/aiidalab_widgets_base/__init__.py
+++ b/aiidalab_widgets_base/__init__.py
@@ -117,4 +117,4 @@ def is_running_in_jupyter():
     "viewer",
 ]
 
-__version__ = "2.2.0a0"
+__version__ = "2.2.0a1"
diff --git a/setup.cfg b/setup.cfg
index ada0dd703..faac7c905 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -67,7 +67,7 @@ docs =
     myst-nb
 
 [bumpver]
-current_version = "v2.2.0a0"
+current_version = "v2.2.0a1"
 version_pattern = "vMAJOR.MINOR.PATCH[PYTAGNUM]"
 commit_message = "Bump version {old_version} -> {new_version}"
 commit = True