diff --git a/packages/pyodide-kernel/package.json b/packages/pyodide-kernel/package.json
index 53a96744..9a1fa4d7 100644
--- a/packages/pyodide-kernel/package.json
+++ b/packages/pyodide-kernel/package.json
@@ -79,8 +79,8 @@
       "py/pyodide-kernel": "0.4.1",
       "py/piplite": "0.4.1",
       "py/ipykernel": "6.9.2",
-      "py/widgetsnbextension3/widgetsnbextension": "3.6.6",
-      "py/widgetsnbextension4/widgetsnbextension": "4.0.11"
+      "py/widgetsnbextension3/widgetsnbextension": "3.6.999",
+      "py/widgetsnbextension4/widgetsnbextension": "4.0.999"
     }
   },
   "styleModule": "style/index.js"
diff --git a/packages/pyodide-kernel/py/widgetsnbextension3/widgetsnbextension/widgetsnbextension/__init__.py b/packages/pyodide-kernel/py/widgetsnbextension3/widgetsnbextension/widgetsnbextension/__init__.py
index 1ddd44ad..3a231785 100644
--- a/packages/pyodide-kernel/py/widgetsnbextension3/widgetsnbextension/widgetsnbextension/__init__.py
+++ b/packages/pyodide-kernel/py/widgetsnbextension3/widgetsnbextension/widgetsnbextension/__init__.py
@@ -1,3 +1,3 @@
 """A widgetsnbextension mock"""
 
-__version__ = "3.6.6"
+__version__ = "3.6.999"
diff --git a/packages/pyodide-kernel/py/widgetsnbextension4/widgetsnbextension/widgetsnbextension/__init__.py b/packages/pyodide-kernel/py/widgetsnbextension4/widgetsnbextension/widgetsnbextension/__init__.py
index dabf38e4..846a4e8d 100644
--- a/packages/pyodide-kernel/py/widgetsnbextension4/widgetsnbextension/widgetsnbextension/__init__.py
+++ b/packages/pyodide-kernel/py/widgetsnbextension4/widgetsnbextension/widgetsnbextension/__init__.py
@@ -1,3 +1,3 @@
 """A widgetsnbextension mock"""
 
-__version__ = "4.0.11"
+__version__ = "4.0.999"
diff --git a/packages/pyodide-kernel/src/_pypi.ts b/packages/pyodide-kernel/src/_pypi.ts
index 2da70a47..3dd8667d 100644
--- a/packages/pyodide-kernel/src/_pypi.ts
+++ b/packages/pyodide-kernel/src/_pypi.ts
@@ -3,5 +3,5 @@ export * as allJSONUrl from '../pypi/all.json';
 export * as ipykernelWheelUrl from '../pypi/ipykernel-6.9.2-py3-none-any.whl';
 export * as pipliteWheelUrl from '../pypi/piplite-0.4.1-py3-none-any.whl';
 export * as pyodide_kernelWheelUrl from '../pypi/pyodide_kernel-0.4.1-py3-none-any.whl';
-export * as widgetsnbextensionWheelUrl from '../pypi/widgetsnbextension-3.6.6-py3-none-any.whl';
-export * as widgetsnbextensionWheelUrl1 from '../pypi/widgetsnbextension-4.0.11-py3-none-any.whl';
+export * as widgetsnbextensionWheelUrl from '../pypi/widgetsnbextension-3.6.999-py3-none-any.whl';
+export * as widgetsnbextensionWheelUrl1 from '../pypi/widgetsnbextension-4.0.999-py3-none-any.whl';