diff --git a/src/Yavsc.Server/Config.cs b/src/Yavsc.Server/Config.cs
index 88a43540..4c321ef1 100644
--- a/src/Yavsc.Server/Config.cs
+++ b/src/Yavsc.Server/Config.cs
@@ -58,7 +58,7 @@ public static class Config
                 ClientName = "Client Credentials Client",
                 ClientSecrets = { new Secret("511536EF-F270-4058-80CA-1C89C192F69A".Sha256()) },
 
-                AllowedGrantTypes = GrantTypes.ClientCredentials,
+                AllowedGrantTypes = GrantTypes.ResourceOwnerPasswordAndClientCredentials,
                 AllowedScopes = { "scope1" }
             },