diff --git a/ipywidgets/_version.py b/ipywidgets/_version.py
index 64d97bd612..1c0366c62f 100644
--- a/ipywidgets/_version.py
+++ b/ipywidgets/_version.py
@@ -1,7 +1,7 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
 
-version_info = (7, 0, 0, 'beta', 0)
+version_info = (7, 0, 0, 'beta', 1)
 
 _specifier_ = {'alpha': 'a', 'beta': 'b', 'candidate': 'rc', 'final': ''}
 
diff --git a/setup.py b/setup.py
index bb002da4fa..cb199f6e94 100644
--- a/setup.py
+++ b/setup.py
@@ -117,7 +117,7 @@
     # only if notebook 4.x is installed in this
     # interpreter, to allow ipywidgets to be
     # installed on bare kernels.
-    'widgetsnbextension~=3.0.0b0',
+    'widgetsnbextension~=3.0.0b1',
 ]
 
 extras_require = setuptools_args['extras_require'] = {
diff --git a/widgetsnbextension/widgetsnbextension/_version.py b/widgetsnbextension/widgetsnbextension/_version.py
index 012d3f01ae..5bdde224ba 100644
--- a/widgetsnbextension/widgetsnbextension/_version.py
+++ b/widgetsnbextension/widgetsnbextension/_version.py
@@ -1,4 +1,4 @@
-version_info = (3, 0, 0, 'beta', 0)
+version_info = (3, 0, 0, 'beta', 1)
 
 _specifier_ = {'alpha': 'a', 'beta': 'b', 'candidate': 'rc', 'final': ''}