diff --git a/src/index.ts b/src/index.ts
index dd859d0..d889dd7 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -64,7 +64,7 @@ db.read().then(() => {
     db.data.probation ||= [];
     db.data.blocked ||= {};
 
-    if (db.data.blocked instanceof Array) {
+    if (Array.isArray(db.data.blocked)) {
         console.log('Running migration: db.blocked');
 
         const blocked = db.data.blocked as unknown as string[];