diff --git a/example.config.json b/example.config.json
index 86c5885..9daabbf 100644
--- a/example.config.json
+++ b/example.config.json
@@ -1,3 +1,6 @@
 {
-  "caldav_url:": "https://mx.example.com"
+  "caldav_url:": "https://mx.example.com",
+  "oauth_enabled": true,
+  "oauth_issuer": "https://sso.example.com/application/o/stalwart/",
+  "oauth_clientid": "stalwart-webui"
 }
diff --git a/main/config.go b/main/config.go
index 0bcd479..30a15f3 100644
--- a/main/config.go
+++ b/main/config.go
@@ -7,7 +7,10 @@ import (
 )
 
 type Config struct {
-	URL string `json:"caldav_url"`
+	URL           string `json:"caldav_url"`
+	OAuthEnabled  bool   `json:"oauth_enabled"`
+	OAuthIssuer   string `json:"oauth_issuer"`
+	OAuthClientID string `json:"oauth_clientid"`
 }
 
 var serverConfig Config