diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 80f943c7983..b4a8511f7da 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -16,7 +16,7 @@ For code issues please include:
 * React-admin version
 * React version
 * Browser version
-* A code example or link to a repo, gist or running site. (hint: fork [this sandbox](https://codesandbox.io/s/349ovjmlx5) to create a reproducible version of your bug)
+* A code example or link to a repo, gist or running site. (hint: fork [this sandbox](https://codesandbox.io/s/github/marmelab/react-admin/tree/master/examples/simple) to create a reproducible version of your bug)
 
 For visual or layout problems, images or animated gifs can help explain your issue.
 It's even better with a live reproduction test case.
diff --git a/.github/ISSUE_TEMPLATE/Bug_report.md b/.github/ISSUE_TEMPLATE/Bug_report.md
index a4c6e83e448..8ba8aaa62e4 100644
--- a/.github/ISSUE_TEMPLATE/Bug_report.md
+++ b/.github/ISSUE_TEMPLATE/Bug_report.md
@@ -18,7 +18,7 @@ about: Something isn't working as expected. Please tell us!
 **Related code:**
 <!-- If you are able to illustrate the bug or feature request with an example, please provide a sample application via one of the following means:
 
-* CodeSandbox (https://codesandbox.io/s/349ovjmlx5)
+* CodeSandbox (https://codesandbox.io/s/github/marmelab/react-admin/tree/master/examples/simple)
 * A sample application via GitHub
 -->
 
diff --git a/README.md b/README.md
index 15b06d25958..d849fcd075e 100644
--- a/README.md
+++ b/README.md
@@ -150,8 +150,8 @@ React-admin is designed as a library of loosely coupled React components built o
 
 There are several examples inside the `examples` folder:
 
-* `simple`: a simple application with posts, comments and users that we use for our e2e tests.
-* `tutorial`: the application built while following the tutorial.
+* `simple` ([CodeSandbox](https://codesandbox.io/s/github/marmelab/react-admin/tree/master/examples/simple)): a simple application with posts, comments and users that we use for our e2e tests.
+* `tutorial` ([CodeSandbox](https://github.com/marmelab/react-admin/tree/master/examples/tutorial)): the application built while following the tutorial.
 * `demo`: the official demo application.
 
 You can run those example applications by calling:
diff --git a/examples/tutorial/src/App.js b/examples/tutorial/src/App.js
index e9bd0433cf1..d7c1b5cc4a5 100644
--- a/examples/tutorial/src/App.js
+++ b/examples/tutorial/src/App.js
@@ -11,7 +11,9 @@ import authProvider from './authProvider';
 
 const App = () => (
     <Admin
-        dataProvider={jsonServerProvider('http://jsonplaceholder.typicode.com')}
+        dataProvider={jsonServerProvider(
+            'https://jsonplaceholder.typicode.com'
+        )}
         authProvider={authProvider}
         dashboard={Dashboard}
     >