diff --git a/.gitignore b/.gitignore
index c274848..fba9326 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ node_modules/
 .vscode/
 coverage/
 .idea
+.DS_Store
diff --git a/package.json b/package.json
index 2202bd3..3f37f1d 100644
--- a/package.json
+++ b/package.json
@@ -46,6 +46,7 @@
     "@babel/runtime": "^7.23.1",
     "@rollup/plugin-commonjs": "^25.0.5",
     "@rollup/plugin-node-resolve": "^15.2.3",
+    "@rollup/plugin-replace": "^6.0.2",
     "@rollup/plugin-terser": "^0.4.4",
     "@rollup/plugin-typescript": "^11.1.5",
     "@types/jest": "^29.5.5",
diff --git a/rollup.config.mjs b/rollup.config.mjs
index 6b176b4..9fb2001 100644
--- a/rollup.config.mjs
+++ b/rollup.config.mjs
@@ -3,6 +3,10 @@ import nodeResolve from '@rollup/plugin-node-resolve';
 import commonjs from '@rollup/plugin-commonjs';
 import terser from '@rollup/plugin-terser';
 import nodePolyfills from 'rollup-plugin-node-polyfills';
+import replace from '@rollup/plugin-replace';
+import fs from 'fs';
+
+const version = JSON.parse(fs.readFileSync('./package.json', 'UTF-8')).version;
 
 export default {
     input: './src/index.ts',
@@ -25,6 +29,10 @@ export default {
         }
     ],
     plugins: [
+        replace({
+            '__VERSION__': version,
+            preventAssignment: true
+        }),
         typescript({
             compilerOptions: {
                 lib: ['es5', 'es6', 'dom'],
diff --git a/src/index.test.ts b/src/index.test.ts
index 8c4ef3c..fb3677d 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -1,6 +1,4 @@
 import { FetchMock } from 'jest-fetch-mock';
-// eslint-disable-next-line @typescript-eslint/no-var-requires
-const packageJSON = require('../package.json');
 import 'jest-localstorage-mock';
 import * as data from './test/testdata.json';
 import IStorageProvider from './storage-provider';
@@ -1383,7 +1381,8 @@ test('Should add `x-unleash` headers', async () => {
         /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
 
     const expectedHeaders = {
-        'x-unleash-sdk': `unleash-js@${packageJSON.version}`,
+        // will be replaced at build time with the actual version
+        'x-unleash-sdk': 'unleash-js@__VERSION__',
         'x-unleash-connection-id': expect.stringMatching(uuidFormat),
         'x-unleash-appname': appName,
     };
diff --git a/src/index.ts b/src/index.ts
index 7e82219..748f00e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -10,9 +10,7 @@ import {
     notNullOrUndefined,
     urlWithContextAsQuery,
 } from './util';
-
-// eslint-disable-next-line @typescript-eslint/no-var-requires
-const packageJSON = require('../package.json');
+import { sdkVersion } from './version';
 
 const DEFINED_FIELDS = [
     'userId',
@@ -476,7 +474,7 @@ export class UnleashClient extends TinyEmitter {
         const headers = {
             [this.headerName]: this.clientKey,
             Accept: 'application/json',
-            'x-unleash-sdk': `unleash-js@${packageJSON.version}`,
+            'x-unleash-sdk': sdkVersion,
             'x-unleash-connection-id': this.connectionId,
             'x-unleash-appname': this.context.appName,
         };
diff --git a/src/metrics.ts b/src/metrics.ts
index 29e2c9f..c769163 100644
--- a/src/metrics.ts
+++ b/src/metrics.ts
@@ -1,8 +1,7 @@
 // Simplified version of: https://github.com/Unleash/unleash-client-node/blob/main/src/metrics.ts
 
 import { notNullOrUndefined } from './util';
-// eslint-disable-next-line @typescript-eslint/no-var-requires
-const packageJSON = require('../package.json');
+import { sdkVersion } from './version';
 
 export interface MetricsOptions {
     onError: OnError;
@@ -127,7 +126,7 @@ export default class Metrics {
             [this.headerName]: this.clientKey,
             Accept: 'application/json',
             'Content-Type': 'application/json',
-            'x-unleash-sdk': `unleash-js@${packageJSON.version}`,
+            'x-unleash-sdk': sdkVersion,
             'x-unleash-connection-id': this.connectionId,
             'x-unleash-appname': this.appName,
         };
diff --git a/src/version.ts b/src/version.ts
new file mode 100644
index 0000000..896c627
--- /dev/null
+++ b/src/version.ts
@@ -0,0 +1 @@
+export const sdkVersion = `unleash-js@__VERSION__`;
diff --git a/yarn.lock b/yarn.lock
index cf404e4..7dce0f5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -642,6 +642,14 @@
     is-module "^1.0.0"
     resolve "^1.22.1"
 
+"@rollup/plugin-replace@^6.0.2":
+  version "6.0.2"
+  resolved "https://registry.yarnpkg.com/@rollup/plugin-replace/-/plugin-replace-6.0.2.tgz#2f565d312d681e4570ff376c55c5c08eb6f1908d"
+  integrity sha512-7QaYCf8bqF04dOy7w/eHmJeNExxTYwvKAmlSAH/EaWWUzbT0h5sbF6bktFoX/0F/0qwng5/dWFMyf3gzaM8DsQ==
+  dependencies:
+    "@rollup/pluginutils" "^5.0.1"
+    magic-string "^0.30.3"
+
 "@rollup/plugin-terser@^0.4.4":
   version "0.4.4"
   resolved "https://registry.yarnpkg.com/@rollup/plugin-terser/-/plugin-terser-0.4.4.tgz#15dffdb3f73f121aa4fbb37e7ca6be9aeea91962"
@@ -2977,9 +2985,9 @@ rollup-pluginutils@^2.8.1:
     estree-walker "^0.6.1"
 
 rollup@^3.29.4:
-  version "3.29.4"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-3.29.4.tgz#4d70c0f9834146df8705bfb69a9a19c9e1109981"
-  integrity sha512-oWzmBZwvYrU0iJHtDmhsm662rC15FRXmcjCk1xD771dFDx5jJ02ufAQQTn0etB2emNk4J9EZg/yWKpsn9BWGRw==
+  version "3.29.5"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-3.29.5.tgz#8a2e477a758b520fb78daf04bca4c522c1da8a54"
+  integrity sha512-GVsDdsbJzzy4S/v3dqWPJ7EfvZJfCHiDqe80IyrF59LYuP+e6U1LJoUqeuqRbwAWoMNoXivMNeNAOf5E22VA1w==
   optionalDependencies:
     fsevents "~2.3.2"