diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index d26d141..b3b0a14 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,5 +1,21 @@
 # Release Notes
 
+## Version 0.4.2.1:
+
+
+### Bug Fixes
+- tries to work around wonky index dropdown search bug introduced by latest dash release. 
+- Dropdown search now works again, but index propagation is still flaky when number of idxs > max_idxs_in_dropdown(1000 by default)
+- displays warning to downgrade to dash 2.6.2 when this happens
+
+### Improvements
+-
+-
+
+### Other Changes
+- applied black to the codebase
+-
+
 
 ## Version 0.4.2:
 ### Breaking Changes
diff --git a/explainerdashboard/__init__.py b/explainerdashboard/__init__.py
index cf6f660..02719f1 100644
--- a/explainerdashboard/__init__.py
+++ b/explainerdashboard/__init__.py
@@ -1,5 +1,5 @@
 
-___version__ = "0.4.2"
+___version__ = "0.4.2.1"
 
 from .explainers import ClassifierExplainer, RegressionExplainer
 from .dashboards import ExplainerDashboard, ExplainerHub, InlineExplainer
diff --git a/setup.py b/setup.py
index 63e77c1..731ca0f 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 
 setup(
     name='explainerdashboard',
-    version='0.4.2',
+    version='0.4.2.1',
     description='Quickly build Explainable AI dashboards that show the inner workings of so-called "blackbox" machine learning models.',
     long_description="""