diff --git a/credentials/Basecamp4OAuth2Api.credentials.ts b/credentials/Basecamp4OAuth2Api.credentials.ts
index e8ca1a8..cf2c174 100644
--- a/credentials/Basecamp4OAuth2Api.credentials.ts
+++ b/credentials/Basecamp4OAuth2Api.credentials.ts
@@ -30,6 +30,12 @@ export class Basecamp4OAuth2Api implements ICredentialType {
 			type: 'hidden',
 			default: 'https://launchpad.37signals.com/authorization/token?type=web_server',
 		},
+		{
+			displayName: 'Refresh Token URL',
+			name: 'refreshTokenUrl',
+			type: 'hidden',
+			default: 'https://launchpad.37signals.com/authorization/token?type=web_server',
+		},
 		{
 			displayName: 'Grant Type',
 			name: 'grantType',