diff --git a/src/backend/base.ts b/src/backend/base.ts
index 96f270e..bb96dab 100644
--- a/src/backend/base.ts
+++ b/src/backend/base.ts
@@ -17,9 +17,9 @@ export abstract class Backend<C extends BackendSettings> {
   }
 
   public remind(config: Config, notification: Notification) {
-    const cfg = config.backend[this.name] as Partial<C>;
+    const cfg = config?.backend?.[this.name] as Partial<C> | undefined;
 
-    if (cfg.enable !== true) {
+    if (cfg?.enable !== true) {
       return
     }