diff --git a/src/internal/api/client.ts b/src/internal/api/client.ts
index e4acfb2..b4c4c4d 100644
--- a/src/internal/api/client.ts
+++ b/src/internal/api/client.ts
@@ -4,10 +4,15 @@ import fetch from 'node-fetch';
 import { SDK_VERSION } from '../../version';
 import { type PaddleOptions } from '../types/config';
 import { Environment } from './environment';
-import { randomUUID } from 'crypto';
 import { Logger } from '../base/logger';
 import { convertToSnakeCase } from './case-helpers';
 import { type ErrorResponse } from '../types/response';
+import type { randomUUID as randomUUIDFn } from 'node:crypto';
+let randomUUID: typeof randomUUIDFn;
+(async () => {
+  const crypto = await import('node:crypto');
+  randomUUID = crypto.randomUUID;
+})();
 
 export class Client {
   private readonly baseUrl: string;
diff --git a/src/notifications/helpers/webhooks-validator.ts b/src/notifications/helpers/webhooks-validator.ts
index 3877a39..60e3f85 100644
--- a/src/notifications/helpers/webhooks-validator.ts
+++ b/src/notifications/helpers/webhooks-validator.ts
@@ -1,4 +1,9 @@
-import { createHmac } from 'crypto';
+import type { createHmac as createHmacFn } from 'node:crypto';
+let createHmac: typeof createHmacFn;
+(async () => {
+  const crypto = await import('node:crypto');
+  createHmac = crypto.createHmac;
+})();
 
 interface ParsedHeaders {
   ts: number;