diff --git a/package.json b/package.json
index 542b86dea..862c033c5 100644
--- a/package.json
+++ b/package.json
@@ -3,9 +3,10 @@
   "version": "0.0.1",
   "license": "MIT",
   "scripts": {
+    "sync-version": "node ./scripts/sync-version.mjs",
     "reset": "bun unlink-all && rimraf dist node_modules doc tmp yarn-error.log yarn.lock package-lock.json bun.lockb learn-debug.log tmp .nx lit-auth-storage pkp-tokens lit-auth-local ./e2e/dist ./e2e/node_modules",
     "go": "bun run build && bun link-all",
-    "build": "bun unlink-all && nx run-many --parallel=false --target=build --all --exclude=wrapped-keys,wrapped-keys-lit-actions && bun run prettier",
+    "build": "bun run sync-version && nx run-many --parallel=false --target=build --all --exclude=wrapped-keys,wrapped-keys-lit-actions && bun run prettier",
     "build:affected": "nx affected --target=build --exclude=wrapped-keys,wrapped-keys-lit-actions",
     "check-deps": "npx nx run-many --target=check-deps --exclude=wrapped-keys,wrapped-keys-lit-actions",
     "validate": "npm run check-deps && npm run build",
diff --git a/packages/constants/src/lib/version.ts b/packages/constants/src/lib/version.ts
index d8c01196c..4a0e26633 100644
--- a/packages/constants/src/lib/version.ts
+++ b/packages/constants/src/lib/version.ts
@@ -1 +1,2 @@
-export const version = '8.0.0-alpha.4';
+// This value is kept in sync with @lit-protocol/lit-client via scripts/sync-version.mjs, run by the build command.
+export const version = '8.0.0';
diff --git a/scripts/sync-version.mjs b/scripts/sync-version.mjs
new file mode 100644
index 000000000..f1175ca22
--- /dev/null
+++ b/scripts/sync-version.mjs
@@ -0,0 +1,83 @@
+#!/usr/bin/env node
+
+import { readFile, writeFile } from 'node:fs/promises';
+import { dirname, resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+// Anchor paths relative to repo root so the script works from any cwd.
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+const repoRoot = resolve(__dirname, '..');
+
+// Matches the exported version constant in packages/constants/src/lib/version.ts.
+const VERSION_EXPORT_PATTERN = /export const version = ['"]([^'\"]+)['"];?/;
+
+async function main() {
+  const litClientPackageJsonPath = resolve(
+    repoRoot,
+    'packages',
+    'lit-client',
+    'package.json'
+  );
+  const versionFilePath = resolve(
+    repoRoot,
+    'packages',
+    'constants',
+    'src',
+    'lib',
+    'version.ts'
+  );
+
+  let litClientPackageJson;
+  try {
+    litClientPackageJson = JSON.parse(
+      await readFile(litClientPackageJsonPath, 'utf8')
+    );
+  } catch (err) {
+    throw new Error(
+      `Failed to read or parse package.json at ${litClientPackageJsonPath}: ${err.message}`
+    );
+  }
+  const litClientVersion = litClientPackageJson.version;
+
+  if (!litClientVersion) {
+    throw new Error(`Version not found in ${litClientPackageJsonPath}`);
+  }
+
+  let versionFileContents;
+  try {
+    versionFileContents = await readFile(versionFilePath, 'utf8');
+  } catch (err) {
+    throw new Error(
+      `Failed to read version file at ${versionFilePath}: ${err.message}`
+    );
+  }
+  const match = versionFileContents.match(VERSION_EXPORT_PATTERN);
+
+  if (!match) {
+    throw new Error(
+      `Could not find exported version constant in ${versionFilePath}`
+    );
+  }
+
+  const currentVersion = match[1];
+
+  if (currentVersion === litClientVersion) {
+    console.log(`version.ts already in sync (${currentVersion})`);
+    return;
+  }
+
+  // Rewrite the version export so it mirrors the lit-client package version.
+  const updatedContents = versionFileContents.replace(
+    VERSION_EXPORT_PATTERN,
+    `export const version = '${litClientVersion}';`
+  );
+
+  await writeFile(versionFilePath, updatedContents);
+  console.log(`Updated version.ts to ${litClientVersion}`);
+}
+
+main().catch((error) => {
+  console.error(error);
+  process.exitCode = 1;
+});