diff --git a/benchmarks.ts b/benchmarks.ts
index b359ea6..d76a634 100644
--- a/benchmarks.ts
+++ b/benchmarks.ts
@@ -1,8 +1,8 @@
 import { run, bench, group, baseline } from 'mitata'
 import { initNostrWasm } from 'nostr-wasm'
-import { NostrEvent } from './core'
-import { finalizeEvent, generateSecretKey } from './pure'
-import { setNostrWasm, verifyEvent } from './wasm'
+import { NostrEvent } from './core.ts'
+import { finalizeEvent, generateSecretKey } from './pure.ts'
+import { setNostrWasm, verifyEvent } from './wasm.ts'
 import { AbstractRelay } from './abstract-relay.ts'
 import { Relay as PureRelay } from './relay.ts'
 import { alwaysTrue } from './helpers.ts'
diff --git a/nip11.test.ts b/nip11.test.ts
index 9255749..af379c0 100644
--- a/nip11.test.ts
+++ b/nip11.test.ts
@@ -1,6 +1,6 @@
 import { describe, test, expect } from 'bun:test'
 import fetch from 'node-fetch'
-import { useFetchImplementation, fetchRelayInformation } from './nip11'
+import { useFetchImplementation, fetchRelayInformation } from './nip11.ts'
 
 // TODO: replace with a mock
 describe('requesting relay as for NIP11', () => {
diff --git a/nip29.ts b/nip29.ts
index 4590a83..297323a 100644
--- a/nip29.ts
+++ b/nip29.ts
@@ -1,10 +1,10 @@
-import { AbstractSimplePool } from './abstract-pool'
-import { Subscription } from './abstract-relay'
-import { decode } from './nip19'
-import type { Event } from './core'
-import { fetchRelayInformation } from './nip11'
-import { normalizeURL } from './utils'
-import { AddressPointer } from './nip19'
+import { AbstractSimplePool } from './abstract-pool.ts'
+import { Subscription } from './abstract-relay.ts'
+import { decode } from './nip19.ts'
+import type { Event } from './core.ts'
+import { fetchRelayInformation } from './nip11.ts'
+import { normalizeURL } from './utils.ts'
+import { AddressPointer } from './nip19.ts'
 
 export function subscribeRelayGroups(
   pool: AbstractSimplePool,
diff --git a/nip47.test.ts b/nip47.test.ts
index 31197f3..fc8fac1 100644
--- a/nip47.test.ts
+++ b/nip47.test.ts
@@ -1,6 +1,6 @@
 import { describe, test, expect } from 'bun:test'
 import { hexToBytes } from '@noble/hashes/utils'
-import { makeNwcRequestEvent, parseConnectionString } from './nip47'
+import { makeNwcRequestEvent, parseConnectionString } from './nip47.ts'
 import { decrypt } from './nip04.ts'
 import { NWCWalletRequest } from './kinds.ts'
 
diff --git a/nip49.test.ts b/nip49.test.ts
index 9517f84..429b539 100644
--- a/nip49.test.ts
+++ b/nip49.test.ts
@@ -1,5 +1,5 @@
 import { test, expect } from 'bun:test'
-import { decrypt, encrypt } from './nip49'
+import { decrypt, encrypt } from './nip49.ts'
 import { hexToBytes } from '@noble/hashes/utils'
 
 test('encrypt and decrypt', () => {
diff --git a/nip49.ts b/nip49.ts
index 264c191..bae1a74 100644
--- a/nip49.ts
+++ b/nip49.ts
@@ -1,7 +1,7 @@
 import { scrypt } from '@noble/hashes/scrypt'
 import { xchacha20poly1305 } from '@noble/ciphers/chacha'
 import { concatBytes, randomBytes } from '@noble/hashes/utils'
-import { Bech32MaxSize, encodeBytes } from './nip19'
+import { Bech32MaxSize, encodeBytes } from './nip19.ts'
 import { bech32 } from '@scure/base'
 
 export function encrypt(sec: Uint8Array, password: string, logn: number = 16, ksb: 0x00 | 0x01 | 0x02 = 0x02): string {
diff --git a/nip58.ts b/nip58.ts
index 3ddb85e..e6e7aa4 100644
--- a/nip58.ts
+++ b/nip58.ts
@@ -1,9 +1,9 @@
-import { Event, EventTemplate } from './core'
+import { Event, EventTemplate } from './core.ts'
 import {
   BadgeAward as BadgeAwardKind,
   BadgeDefinition as BadgeDefinitionKind,
   ProfileBadges as ProfileBadgesKind,
-} from './kinds'
+} from './kinds.ts'
 
 /**
  * Represents the structure for defining a badge within the Nostr network.
diff --git a/nip75.ts b/nip75.ts
index 5b07ea0..020d7b0 100644
--- a/nip75.ts
+++ b/nip75.ts
@@ -1,5 +1,5 @@
-import { Event, EventTemplate } from './core'
-import { ZapGoal } from './kinds'
+import { Event, EventTemplate } from './core.ts'
+import { ZapGoal } from './kinds.ts'
 
 /**
  * Represents a fundraising goal in the Nostr network as defined by NIP-75.
diff --git a/nip94.ts b/nip94.ts
index 94bee75..6b2f9cf 100644
--- a/nip94.ts
+++ b/nip94.ts
@@ -1,4 +1,4 @@
-import { Event, EventTemplate } from './core'
+import { Event, EventTemplate } from './core.ts'
 import { FileMetadata as FileMetadataKind } from './kinds.ts'
 
 /**
diff --git a/nip96.ts b/nip96.ts
index 4d5f25e..38cd009 100644
--- a/nip96.ts
+++ b/nip96.ts
@@ -1,6 +1,6 @@
 import { sha256 } from '@noble/hashes/sha256'
-import { EventTemplate } from './core'
-import { FileServerPreference } from './kinds'
+import { EventTemplate } from './core.ts'
+import { FileServerPreference } from './kinds.ts'
 import { bytesToHex } from '@noble/hashes/utils'
 
 /**
diff --git a/nip99.test.ts b/nip99.test.ts
index 442cd6b..f2aa2d1 100644
--- a/nip99.test.ts
+++ b/nip99.test.ts
@@ -1,9 +1,9 @@
 import { describe, expect, test } from 'bun:test'
 
-import { Event } from './core'
-import { ClassifiedListing, DraftClassifiedListing } from './kinds'
-import { ClassifiedListingObject, generateEventTemplate, parseEvent, validateEvent } from './nip99'
-import { finalizeEvent, generateSecretKey } from './pure'
+import { Event } from './core.ts'
+import { ClassifiedListing, DraftClassifiedListing } from './kinds.ts'
+import { ClassifiedListingObject, generateEventTemplate, parseEvent, validateEvent } from './nip99.ts'
+import { finalizeEvent, generateSecretKey } from './pure.ts'
 
 describe('validateEvent', () => {
   test('should return true for a valid classified listing event', () => {
diff --git a/wasm.ts b/wasm.ts
index e4c1fe6..3018dc8 100644
--- a/wasm.ts
+++ b/wasm.ts
@@ -1,6 +1,6 @@
 import { bytesToHex } from '@noble/hashes/utils'
 import { Nostr as NostrWasm } from 'nostr-wasm'
-import { EventTemplate, Event, Nostr, VerifiedEvent, verifiedSymbol } from './core'
+import { EventTemplate, Event, Nostr, VerifiedEvent, verifiedSymbol } from './core.ts'
 
 let nw: NostrWasm