diff --git a/pyproject.toml b/pyproject.toml
index 0a11d504..73761e8e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "vitessce"
-version = "3.2.0"
+version = "3.2.1"
 authors = [
   { name="Mark Keller", email="mark_keller@hms.harvard.edu" },
 ]
diff --git a/vitessce/widget.py b/vitessce/widget.py
index 95a48e72..f728659b 100644
--- a/vitessce/widget.py
+++ b/vitessce/widget.py
@@ -327,11 +327,11 @@ class VitessceWidget(anywidget.AnyWidget):
 
     next_port = DEFAULT_PORT
 
-    js_package_version = Unicode('3.2.1').tag(sync=True)
+    js_package_version = Unicode('3.3.3').tag(sync=True)
     js_dev_mode = Bool(False).tag(sync=True)
     custom_js_url = Unicode('').tag(sync=True)
 
-    def __init__(self, config, height=600, theme='auto', uid=None, port=None, proxy=False, js_package_version='3.2.1', js_dev_mode=False, custom_js_url=''):
+    def __init__(self, config, height=600, theme='auto', uid=None, port=None, proxy=False, js_package_version='3.3.3', js_dev_mode=False, custom_js_url=''):
         """
         Construct a new Vitessce widget.
 
@@ -399,7 +399,7 @@ def close(self):
 # Launch Vitessce using plain HTML representation (no ipywidgets)
 
 
-def ipython_display(config, height=600, theme='auto', base_url=None, host_name=None, uid=None, port=None, proxy=False, js_package_version='3.2.1', js_dev_mode=False, custom_js_url=''):
+def ipython_display(config, height=600, theme='auto', base_url=None, host_name=None, uid=None, port=None, proxy=False, js_package_version='3.3.3', js_dev_mode=False, custom_js_url=''):
     from IPython.display import display, HTML
     uid_str = "vitessce" + get_uid_str(uid)