diff --git a/argocd/apps/argocd-self.yaml b/argocd/apps/argocd-self.yaml
index e6d785a..76fb2fb 100644
--- a/argocd/apps/argocd-self.yaml
+++ b/argocd/apps/argocd-self.yaml
@@ -24,6 +24,7 @@ spec:
               issuer: https://auth.nik4nao.com/application/o/argocd/
               clientID: xg3XsKFdFhAt8103X9KUoH72MiPEyLDlpTDcx5hT
               clientSecret: $argocd-oidc-secret:oidc.authentik.clientSecret
+              clientAuthMethod: client_secret_post
               requestedScopes:
                 - openid
                 - profile