diff --git a/.changeset/fluffy-clocks-lie.md b/.changeset/fluffy-clocks-lie.md
new file mode 100644
index 0000000..6345358
--- /dev/null
+++ b/.changeset/fluffy-clocks-lie.md
@@ -0,0 +1,5 @@
+---
+'@rosen-bridge/rosenet-relay': minor
+---
+
+Add pubsub related configs
diff --git a/packages/rosenet-relay/lib/constants.ts b/packages/rosenet-relay/lib/constants.ts
index de726d3..5a38cce 100644
--- a/packages/rosenet-relay/lib/constants.ts
+++ b/packages/rosenet-relay/lib/constants.ts
@@ -1,3 +1,4 @@
 export const DEFAULT_LISTEN_HOST = '0.0.0.0';
 export const RESERVATION_DATA_LIMIT = 1_000_000_000n; // 1GB
 export const RESERVATION_DURATION_LIMIT = 60 * 60_000; // 1 hour
+export const DEFAULT_GOSSIPSUB_MAX_INBOUND_DATA_LENGTH = 170_000_000;
diff --git a/packages/rosenet-relay/lib/createRoseNetRelay.ts b/packages/rosenet-relay/lib/createRoseNetRelay.ts
index 97160c5..d44b3a6 100644
--- a/packages/rosenet-relay/lib/createRoseNetRelay.ts
+++ b/packages/rosenet-relay/lib/createRoseNetRelay.ts
@@ -19,6 +19,7 @@ import {
 import { RoseNetRelayError } from './errors';
 
 import {
+  DEFAULT_GOSSIPSUB_MAX_INBOUND_DATA_LENGTH,
   DEFAULT_LISTEN_HOST,
   RESERVATION_DATA_LIMIT,
   RESERVATION_DURATION_LIMIT,
@@ -93,7 +94,8 @@ const createRoseNetRelay = async ({
         Dhi: 0,
         Dout: 0,
         doPX: true,
-        globalSignaturePolicy: 'StrictNoSign',
+        globalSignaturePolicy:
+          config.pubsub?.gossipsubSignaturePolicy ?? 'StrictNoSign',
         ignoreDuplicatePublishError: true,
         /**
          * Current implementation of Gossipsub includes at most 5000 messages in
@@ -102,7 +104,9 @@ const createRoseNetRelay = async ({
          * maximum of around 5000*100KB=500MB is received in 3 heartbeats from
          * a single stream, which is 500MB/3≃170MB.
          */
-        maxInboundDataLength: 170_000_000, // 170MB
+        maxInboundDataLength:
+          config.pubsub?.gossipsubMaxInboundDataLength ??
+          DEFAULT_GOSSIPSUB_MAX_INBOUND_DATA_LENGTH,
       }),
       identify: identify(),
       ping: ping({
diff --git a/packages/rosenet-relay/lib/types.ts b/packages/rosenet-relay/lib/types.ts
index 02d06c1..25cd33f 100644
--- a/packages/rosenet-relay/lib/types.ts
+++ b/packages/rosenet-relay/lib/types.ts
@@ -1,4 +1,5 @@
 import { AbstractLogger } from '@rosen-bridge/logger-interface';
+import { SignaturePolicy } from '@libp2p/interface';
 
 export interface RoseNetRelayConfig {
   listen?: {
@@ -12,4 +13,8 @@ export interface RoseNetRelayConfig {
   debug?: {
     libp2pComponents?: string[];
   };
+  pubsub?: {
+    gossipsubMaxInboundDataLength?: number;
+    gossipsubSignaturePolicy?: SignaturePolicy;
+  };
 }