diff --git a/src/app.ts b/src/app.ts
index 82e083cc..2a36a83e 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -1,3 +1,4 @@
+import '@/cron.ts';
 import {
   type Context,
   cors,
diff --git a/src/cron.ts b/src/cron.ts
new file mode 100644
index 00000000..1e08fdb8
--- /dev/null
+++ b/src/cron.ts
@@ -0,0 +1,17 @@
+import * as eventsDB from '@/db/events.ts';
+import { cron } from '@/deps.ts';
+import { Time } from '@/utils/time.ts';
+
+/** Clean up old remote events. */
+async function cleanupEvents() {
+  console.log('Cleaning up old remote events...');
+
+  const [result] = await eventsDB.deleteFilters([{
+    until: Math.floor((Date.now() - Time.days(7)) / 1000),
+    local: false,
+  }]);
+
+  console.log(`Deleted ${result?.numDeletedRows ?? 0} events.`);
+}
+
+cron.hourly(cleanupEvents);
diff --git a/src/db/events.ts b/src/db/events.ts
index 59480d38..0e03fbd6 100644
--- a/src/db/events.ts
+++ b/src/db/events.ts
@@ -156,7 +156,7 @@ async function getFilters<K extends number>(
 
 /** Delete events based on filters from the database. */
 function deleteFilters<K extends number>(filters: DittoFilter<K>[]) {
-  if (!filters.length) return Promise.resolve();
+  if (!filters.length) return Promise.resolve([]);
   const query = getFiltersQuery(filters);
 
   return db
diff --git a/src/deps.ts b/src/deps.ts
index b26bd8f4..f4efc62c 100644
--- a/src/deps.ts
+++ b/src/deps.ts
@@ -65,5 +65,6 @@ export {
 } from 'npm:kysely@^0.25.0';
 export { DenoSqliteDialect } from 'https://gitlab.com/soapbox-pub/kysely-deno-sqlite/-/raw/v1.0.1/mod.ts';
 export { default as tldts } from 'npm:tldts@^6.0.14';
+export * as cron from 'https://deno.land/x/deno_cron@v1.0.0/cron.ts';
 
 export type * as TypeFest from 'npm:type-fest@^4.3.0';