diff --git a/src/OpenIddict.Abstractions/Primitives/OpenIddictParameter.cs b/src/OpenIddict.Abstractions/Primitives/OpenIddictParameter.cs
index 7a3c6e20..059839de 100644
--- a/src/OpenIddict.Abstractions/Primitives/OpenIddictParameter.cs
+++ b/src/OpenIddict.Abstractions/Primitives/OpenIddictParameter.cs
@@ -681,7 +681,7 @@ public readonly struct OpenIddictParameter : IEquatable<OpenIddictParameter>
 
         var result = _value switch
         {
-            // When the parameter is a JsonElement representing an array, return the requested item.
+            // When the parameter is a JsonElement representing an object, return the requested item.
             JsonElement { ValueKind: JsonValueKind.Object } element =>
                 element.TryGetProperty(name, out JsonElement property) ? new(property) : null,
 
diff --git a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Revocation.cs b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Revocation.cs
index 219d087f..7fdb2555 100644
--- a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Revocation.cs
+++ b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Revocation.cs
@@ -195,14 +195,14 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                 {
                     // MusicBrainz returns empty revocation responses declared as "text/html" responses.
                     //
-                    // Since empty HTML payloads are not valid JSON nodes, the Content-Length is manually set
-                    // to 0 to prevent OpenIddict from trying to extract a JSON payload from such responses.
+                    // Since empty HTML payloads are not valid JSON nodes, the Content-Type is manually set
+                    // to null to prevent OpenIddict from trying to extract a JSON payload from such responses.
                     ProviderTypes.MusicBrainz when response.Content.Headers.ContentLength is 0 => null,
 
                     // Reddit returns empty revocation responses declared as "application/json" responses.
                     //
-                    // Since empty JSON payloads are not valid JSON nodes, the Content-Length is manually set
-                    // to 0 to prevent OpenIddict from trying to extract a JSON payload from such responses.
+                    // Since empty JSON payloads are not valid JSON nodes, the Content-Type is manually set
+                    // to null to prevent OpenIddict from trying to extract a JSON payload from such responses.
                     ProviderTypes.Reddit when response.Content.Headers.ContentLength is 0 => null,
 
                     _ => response.Content.Headers.ContentType
diff --git a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xsd b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xsd
index 180c8768..4f05cef2 100644
--- a/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xsd
+++ b/src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xsd
@@ -64,7 +64,12 @@
                                 <xs:simpleType>
                                   <xs:restriction base="xs:string">
                                     <xs:enumeration value="client_secret_basic" />
+                                    <xs:enumeration value="client_secret_jwt" />
                                     <xs:enumeration value="client_secret_post" />
+                                    <xs:enumeration value="none" />
+                                    <xs:enumeration value="private_key_jwt" />
+                                    <xs:enumeration value="self_signed_tls_client_auth" />
+                                    <xs:enumeration value="tls_client_auth" />
                                   </xs:restriction>
                                 </xs:simpleType>
                               </xs:attribute>
@@ -171,7 +176,12 @@
                                 <xs:simpleType>
                                   <xs:restriction base="xs:string">
                                     <xs:enumeration value="client_secret_basic" />
+                                    <xs:enumeration value="client_secret_jwt" />
                                     <xs:enumeration value="client_secret_post" />
+                                    <xs:enumeration value="none" />
+                                    <xs:enumeration value="private_key_jwt" />
+                                    <xs:enumeration value="self_signed_tls_client_auth" />
+                                    <xs:enumeration value="tls_client_auth" />
                                   </xs:restriction>
                                 </xs:simpleType>
                               </xs:attribute>
@@ -192,7 +202,12 @@
                                 <xs:simpleType>
                                   <xs:restriction base="xs:string">
                                     <xs:enumeration value="client_secret_basic" />
+                                    <xs:enumeration value="client_secret_jwt" />
                                     <xs:enumeration value="client_secret_post" />
+                                    <xs:enumeration value="none" />
+                                    <xs:enumeration value="private_key_jwt" />
+                                    <xs:enumeration value="self_signed_tls_client_auth" />
+                                    <xs:enumeration value="tls_client_auth" />
                                   </xs:restriction>
                                 </xs:simpleType>
                               </xs:attribute>
@@ -213,7 +228,12 @@
                                 <xs:simpleType>
                                   <xs:restriction base="xs:string">
                                     <xs:enumeration value="client_secret_basic" />
+                                    <xs:enumeration value="client_secret_jwt" />
                                     <xs:enumeration value="client_secret_post" />
+                                    <xs:enumeration value="none" />
+                                    <xs:enumeration value="private_key_jwt" />
+                                    <xs:enumeration value="self_signed_tls_client_auth" />
+                                    <xs:enumeration value="tls_client_auth" />
                                   </xs:restriction>
                                 </xs:simpleType>
                               </xs:attribute>