diff --git a/package.json b/package.json
index f6e28e7..122f65b 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
     "dev": "astro dev",
     "start": "astro dev",
     "build": "astro build",
+    "cleanup-flags": "deno run --allow-all utils/cleanup-flags.js",
     "preview": "astro preview",
     "astro": "astro",
     "core": "deno run --allow-all utils/core.js",
diff --git a/utils/cleanup-flags.js b/utils/cleanup-flags.js
new file mode 100644
index 0000000..ea8b2a6
--- /dev/null
+++ b/utils/cleanup-flags.js
@@ -0,0 +1,13 @@
+import { join } from "https://deno.land/std@0.216.0/path/join.ts";
+
+const src = JSON.parse(await Deno.readTextFile("./src/core.json"));
+const usedFlags = [...new Set(src.events.map((e) => e.country + ".svg"))];
+
+console.log(usedFlags);
+
+const flagDir = "./dist/flags";
+for await (const f of Deno.readDir(flagDir)) {
+  if (f.isDirectory || !usedFlags.includes(f.name)) {
+    await Deno.remove(join(flagDir, f.name), { recursive: true });
+  }
+}