diff --git a/authelia/configuration.yml b/authelia/configuration.yml
index 056e568..3521ce6 100644
--- a/authelia/configuration.yml
+++ b/authelia/configuration.yml
@@ -108,7 +108,7 @@ identity_providers:
       - phone
       authorization_policy: one_factor
       pre_configured_consent_duration: 8h
-      token_endpoint_auth_method: client_secret_post
+      token_endpoint_auth_method: client_secret_basic
     - client_id: kubernetes
       client_name: Kubernetes
       public: true