diff --git a/sandbox/OpenIddict.Sandbox.AspNetCore.Client/Startup.cs b/sandbox/OpenIddict.Sandbox.AspNetCore.Client/Startup.cs
index 9f0fa760..d9bcc474 100644
--- a/sandbox/OpenIddict.Sandbox.AspNetCore.Client/Startup.cs
+++ b/sandbox/OpenIddict.Sandbox.AspNetCore.Client/Startup.cs
@@ -150,7 +150,8 @@ public class Startup
                        {
                            options.SetClientId("bXgwc0U3N3A3YWNuaWVsdlRmRWE6MTpjaQ")
                                   .SetClientSecret("VcohOgBp-6yQCurngo4GAyKeZh0D6SUCCSjJgEo1uRzJarjIUS")
-                                  .SetRedirectUri("https://localhost:44381/callback/login/twitter");
+                                  .SetRedirectUri("https://localhost:44381/callback/login/twitter")
+                                  .AddScopes("offline.access");
                        });
             });
 
diff --git a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml
index f68218a5..1eec13c8 100644
--- a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml
+++ b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml
@@ -168,6 +168,9 @@
                      UserinfoEndpoint="https://api.twitter.com/2/users/me">
         <CodeChallengeMethod Value="S256" />
 
+        <GrantType Value="authorization_code" />
+        <GrantType Value="refresh_token" />
+
         <TokenEndpointAuthMethod Value="client_secret_basic" />
       </Configuration>