diff --git a/package.json b/package.json
index a17af79..f341ec3 100644
--- a/package.json
+++ b/package.json
@@ -181,7 +181,7 @@
   },
   "devDependencies": {
     "@libp2p/peer-id-factory": "^4.0.2",
-    "aegir": "^42.1.1",
+    "aegir": "^44.1.1",
     "protons": "^7.3.3"
   },
   "sideEffects": false
diff --git a/src/index.ts b/src/index.ts
index aac9f0c..f6373cc 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -170,7 +170,7 @@ export async function create (peerId: PeerId, value: CID | PeerId | string, seq:
   // Validity in ISOString with nanoseconds precision and validity type EOL
   const expirationDate = new NanoDate(Date.now() + Number(lifetime))
   const validityType = IpnsEntry.ValidityType.EOL
-  const ttlNs = BigInt(options.ttlNs != null ? options.ttlNs : DEFAULT_TTL_NS)
+  const ttlNs = BigInt(options.ttlNs ?? DEFAULT_TTL_NS)
 
   return _create(peerId, value, seq, validityType, expirationDate.toString(), ttlNs, options)
 }
@@ -197,7 +197,7 @@ export async function createWithExpiration (peerId: PeerId, value: CID | PeerId
 export async function createWithExpiration (peerId: PeerId, value: CID | PeerId | string, seq: number | bigint, expiration: string, options: CreateOptions = defaultCreateOptions): Promise<IPNSRecord> {
   const expirationDate = NanoDate.fromString(expiration)
   const validityType = IpnsEntry.ValidityType.EOL
-  const ttlNs = BigInt(options.ttlNs != null ? options.ttlNs : DEFAULT_TTL_NS)
+  const ttlNs = BigInt(options.ttlNs ?? DEFAULT_TTL_NS)
 
   return _create(peerId, value, seq, validityType, expirationDate.toString(), ttlNs, options)
 }