diff --git a/src/service/service.ts b/src/service/service.ts
index 49ed33a6..53eda9a5 100644
--- a/src/service/service.ts
+++ b/src/service/service.ts
@@ -194,11 +194,12 @@ export class Discv5 extends (EventEmitter as { new (): Discv5EventEmitter }) {
     const fullConfig = { ...defaultConfig, ...config };
     const decodedEnr = typeof enr === "string" ? ENR.decodeTxt(enr) : enr;
     const rateLimiter = opts.rateLimiterOpts && new RateLimiter(opts.rateLimiterOpts, metrics ?? null);
-    const sessionService = new SessionService(fullConfig, {
-      enr: decodedEnr,
-      keypair: createKeypairFromPeerId(peerId),
-      transport: transport ?? new UDPTransportService(multiaddr, decodedEnr.nodeId, rateLimiter),
-    });
+    const sessionService = new SessionService(
+      fullConfig,
+      decodedEnr,
+      createKeypairFromPeerId(peerId),
+      transport ?? new UDPTransportService(multiaddr, decodedEnr.nodeId, rateLimiter)
+    );
     return new Discv5(fullConfig, sessionService, metrics);
   }
 
diff --git a/src/session/service.ts b/src/session/service.ts
index 1cd2c600..ff5f2700 100644
--- a/src/session/service.ts
+++ b/src/session/service.ts
@@ -134,11 +134,9 @@ export class SessionService extends (EventEmitter as { new (): StrictEventEmitte
    */
   private sessions: LRUCache<NodeAddressString, Session>;
 
-  constructor(config: ISessionConfig, opts: SessionServiceOpts) {
+  constructor(config: ISessionConfig, enr: ENR, keypair: IKeypair, transport: ITransportService) {
     super();
 
-    const { enr, keypair, transport } = opts;
-
     // ensure the keypair matches the one that signed the ENR
     if (!keypair.publicKey.equals(enr.publicKey)) {
       throw new Error("Provided keypair does not match the provided ENR keypair");
@@ -758,11 +756,11 @@ export class SessionService extends (EventEmitter as { new (): StrictEventEmitte
   }
 
   private removeExpectedResponse(socketAddr: Multiaddr): void {
-    this.transport.addExpectedResponse(socketAddr.toOptions().host);
+    this.transport.addExpectedResponse?.(socketAddr.toOptions().host);
   }
 
   private addExpectedResponse(socketAddr: Multiaddr): void {
-    this.transport.removeExpectedResponse(socketAddr.toOptions().host);
+    this.transport.removeExpectedResponse?.(socketAddr.toOptions().host);
   }
 
   private handleRequestTimeout(nodeAddr: INodeAddress, requestCall: IRequestCall): void {
diff --git a/src/transport/types.ts b/src/transport/types.ts
index 4f4cda2a..f8f1ddbe 100644
--- a/src/transport/types.ts
+++ b/src/transport/types.ts
@@ -31,7 +31,7 @@ export interface ITransportService extends TransportEventEmitter {
   send(to: Multiaddr, toId: string, packet: IPacket): Promise<void>;
 
   /** Add 1 expected response of unknown lenght from IP for rate limiter */
-  addExpectedResponse(ipAddress: string): void;
+  addExpectedResponse?(ipAddress: string): void;
   /** Remove 1 expected response from IP added with addExpectedResponse */
-  removeExpectedResponse(ipAddress: string): void;
+  removeExpectedResponse?(ipAddress: string): void;
 }
diff --git a/test/unit/session/service.test.ts b/test/unit/session/service.test.ts
index 9fcd9341..22430c74 100644
--- a/test/unit/session/service.test.ts
+++ b/test/unit/session/service.test.ts
@@ -42,8 +42,8 @@ describe("session service", () => {
     transport0 = new UDPTransportService(addr0, enr0.nodeId);
     transport1 = new UDPTransportService(addr1, enr1.nodeId);
 
-    service0 = new SessionService(defaultConfig, { enr: enr0, keypair: kp0, transport: transport0 });
-    service1 = new SessionService(defaultConfig, { enr: enr1, keypair: kp1, transport: transport1 });
+    service0 = new SessionService(defaultConfig, enr0, kp0, transport0);
+    service1 = new SessionService(defaultConfig, enr1, kp1, transport1);
 
     await service0.start();
     await service1.start();