diff --git a/commands/README.md b/commands/README.md
index 9ee04fed..acc89d28 100644
--- a/commands/README.md
+++ b/commands/README.md
@@ -15,7 +15,7 @@ It is quite common for an extension to define one or more such commands.
 
 In this extension, you are going to add a command to the application command registry.
 
-The registry has `CommandRegistry` type ([documentation](https://lumino.readthedocs.io/en/1.x/api/commands/classes/commandregistry.html)).
+The registry has `CommandRegistry` type ([documentation](https://lumino.readthedocs.io/en/stable/api/classes/commands.CommandRegistry-1.html)).
 
 To see how you can access the application command registry, open the file `src/index.ts`.
 
@@ -58,7 +58,7 @@ The CommandRegistry is an attribute of the main JupyterLab application
 adds your own function.
 
 That method takes two arguments: the unique command id
-and [options](https://lumino.readthedocs.io/en/1.x/api/commands/interfaces/commandregistry.icommandoptions.html) for the command.
+and [options](https://lumino.readthedocs.io/en/stable/api/interfaces/commands.CommandRegistry.ICommandOptions.html) for the command.
 
 The only mandatory option is `execute`, this takes the function to be called
 when the command is executed. It can optionally takes arguments (arbitrarily defined
diff --git a/contentheader/README.md b/contentheader/README.md
index caadb7e3..7cfb64d9 100644
--- a/contentheader/README.md
+++ b/contentheader/README.md
@@ -87,7 +87,7 @@ For full details see the body of the `execute` function in [`index.ts`](./src/in
 
 First, get a `MainAreaWidget`. The approach used here will likely be useful for many JupyterLab use cases: `JupyterFrontEnd.shell.currentWidget` will be a `MainAreaWidget` if your extension is being activated with a classic JupyterLab window, and you can ensure that by testing for `app.shell.currentWidget instanceof MainAreaWidget`.
 
-`MainAreaWidget.contentHeader` is a "top-to-bottom" vertical [Lumino BoxPanel](https://lumino.readthedocs.io/en/1.x/api/widgets/classes/boxpanel.html). You can call its `addWidget` and `insertWidget` methods to populate this space with your own custom widgets.
+`MainAreaWidget.contentHeader` is a "top-to-bottom" vertical [Lumino BoxPanel](https://lumino.readthedocs.io/en/stable/api/classes/widgets.BoxPanel-1.html). You can call its `addWidget` and `insertWidget` methods to populate this space with your own custom widgets.
 
 ## Background
 
diff --git a/datagrid/README.md b/datagrid/README.md
index 89fcda03..61699ff7 100644
--- a/datagrid/README.md
+++ b/datagrid/README.md
@@ -7,7 +7,7 @@
 JupyterLab is built on top of [Lumino](https://github.com/jupyterlab/lumino).
 That library defines `Widget` as the primary interface brick.
 
-In this example [the datagrid lumino example](https://lumino.readthedocs.io/en/1.x/api/datagrid/classes/datagrid.html)
+In this example [the datagrid lumino example](https://lumino.readthedocs.io/en/stable/api/classes/datagrid.DataGrid-1.html)
 is integrated into JupyterLab.
 
 First you need to import `StackedPanel`, `DataGrid`
diff --git a/kernel-messaging/README.md b/kernel-messaging/README.md
index 6743c884..e3788851 100644
--- a/kernel-messaging/README.md
+++ b/kernel-messaging/README.md
@@ -76,7 +76,7 @@ const manager = app.serviceManager;
 With these lines, you can extend the panel widget from the [signal example](../signals) to initialize a
 kernel. In addition, you will create a `KernelModel` class in it and
 overwrite the `dispose` and `onCloseRequest` methods of the `StackedPanel`
-([see the documentation](https://lumino.readthedocs.io/en/1.x/api/widgets/classes/stackedpanel.html))
+([see the documentation](https://lumino.readthedocs.io/en/stable/api/classes/widgets.StackedPanel-1.html))
 to free the kernel session resources if the panel is closed. The whole adapted
 panel class looks like this:
 
diff --git a/signals/README.md b/signals/README.md
index 79a09f07..3463d6eb 100644
--- a/signals/README.md
+++ b/signals/README.md
@@ -16,7 +16,7 @@ In this extension, a simple HTML button will be added to print something to the
 
 JupyterLab's Lumino engine uses the `ISignal` interface and the
 `Signal` class that implements this interface for communication
-(read more on the [documentation](https://lumino.readthedocs.io/en/1.x/api/signaling/index.html) page).
+(read more on the [documentation](https://lumino.readthedocs.io/en/stable/api/modules/signaling.html) page).
 
 The basic concept is as follows:
 
diff --git a/widgets/README.md b/widgets/README.md
index dbd16f35..be754189 100644
--- a/widgets/README.md
+++ b/widgets/README.md
@@ -4,7 +4,7 @@
 
 In this example you will learn how to add a new tab to JupyterLab.
 
-Visible elements such as tabs and notebooks are represented by widgets in the [Lumino](https://lumino.readthedocs.io/en/1.x/api/widgets/index.html)
+Visible elements such as tabs and notebooks are represented by widgets in the [Lumino](https://lumino.readthedocs.io/en/stable/api/modules/widgets.html)
 library that is the basis of the JupyterLab application.
 
 It is the fundamental brick of any visual component in the JupyterLab interface.