diff --git a/config/providers_oauth2/argocd.yaml b/config/providers_oauth2/argocd.yaml
index fb4d33a..f98f880 100644
--- a/config/providers_oauth2/argocd.yaml
+++ b/config/providers_oauth2/argocd.yaml
@@ -12,6 +12,8 @@
 name: ArgoCD
 authorization_flow: default-provider-authorization-implicit-consent
 invalidation_flow: default-provider-invalidation-flow
+# ArgoCD stores the id_token as its session; this sets the login length.
+access_token_validity: hours=24
 client_type: public
 client_id: argocd
 client_secret_vault: