diff --git a/guide/migration/20-to-30.html b/guide/migration/20-to-30.html
index 9894614..8059577 100644
--- a/guide/migration/20-to-30.html
+++ b/guide/migration/20-to-30.html
@@ -135,6 +135,8 @@ and are no longer supported. Make sure your application (or intermediate librari
 </tr>
 </tbody>
 </table>
+<div class="IMPORTANT"><h5>Important</h5><p>If your application references the <code>OpenIdConnectConstants</code> class, update it to use <code>OpenIddictConstants</code> instead.</p>
+</div>
 <h2 id="update-the-references-to-the-entity-framework-coreentity-framework-6mongodb-models">Update the references to the Entity Framework Core/Entity Framework 6/MongoDB models</h2>
 <p>If your application references the <code>OpenIddictApplication</code>, <code>OpenIddictAuthorization</code>, <code>OpenIddictScope</code> or <code>OpenIddictToken</code> models, update these reference to use
 their new names: <code>OpenIddict[provider name]Application</code>, <code>OpenIddict[provider name]Authorization</code>, <code>OpenIddict[provider name]Scope</code> and <code>OpenIddict[provider name]Token</code>
diff --git a/manifest.json b/manifest.json
index 581f4e0..a9d0312 100644
--- a/manifest.json
+++ b/manifest.json
@@ -7204,7 +7204,7 @@
       "output": {
         ".html": {
           "relative_path": "guide/migration/20-to-30.html",
-          "hash": "Hya+jMztUMju6xslqDncsQ=="
+          "hash": "EJ4xQ9AiBosladCHqCh3LQ=="
         }
       },
       "is_incremental": false,