diff --git a/packages/backend/src/remote/activitypub/misc/ld-signature.ts b/packages/backend/src/remote/activitypub/misc/ld-signature.ts
index 2d1e7ef6b..b654e8976 100644
--- a/packages/backend/src/remote/activitypub/misc/ld-signature.ts
+++ b/packages/backend/src/remote/activitypub/misc/ld-signature.ts
@@ -126,6 +126,7 @@ export class LdSignature {
 			headers: {
 				Accept: "application/ld+json, application/json",
 			},
+			size: 1024 * 1024, // 1MiB
 			// TODO
 			//timeout: this.loderTimeout,
 			agent: (u) => (u.protocol === "http:" ? httpAgent : httpsAgent),