diff --git a/service/src/main/java/bio/terra/externalcreds/services/ProviderTokenClientCache.java b/service/src/main/java/bio/terra/externalcreds/services/ProviderTokenClientCache.java
index 0370be5d..2cdcabee 100644
--- a/service/src/main/java/bio/terra/externalcreds/services/ProviderTokenClientCache.java
+++ b/service/src/main/java/bio/terra/externalcreds/services/ProviderTokenClientCache.java
@@ -61,7 +61,7 @@ public ClientRegistration buildClientRegistration(
                     .toList()
                     .get(0);
             yield ClientRegistration.withRegistrationId(providerName)
-                .authorizationGrantType(AuthorizationGrantType.AUTHORIZATION_CODE)
+                .authorizationGrantType(AuthorizationGrantType.REFRESH_TOKEN)
                 .clientId(providerInfo.getClientId())
                 .clientSecret(providerInfo.getClientSecret())
                 .issuerUri(providerInfo.getIssuer())