diff --git a/src/routes/+error.svelte b/src/routes/+error.svelte
new file mode 100644
index 0000000..ba65186
--- /dev/null
+++ b/src/routes/+error.svelte
@@ -0,0 +1,5 @@
+<script lang="ts">
+  import { redirect } from '@sveltejs/kit';
+
+  redirect(301, '/');
+</script>
diff --git a/src/routes/directory/[slug]/+page.ts b/src/routes/directory/[slug]/+page.ts
index 10fc98d..8724bcc 100644
--- a/src/routes/directory/[slug]/+page.ts
+++ b/src/routes/directory/[slug]/+page.ts
@@ -21,6 +21,11 @@ export const load = (async ({ params }) => {
     }
   });
 
+  // If SVGs array is empty, category can't exist
+  if (svgsByCategory.length === 0) {
+    return error(404, 'Not found');
+  }
+
   return {
     category: slug as string,
     svgs: svgsByCategory