diff --git a/README.md b/README.md
index a877d48..219df47 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ function telemetry(Request $request, ?int $userId = null): Request
     return (new TelemetryRequest($request, new TelemetryHeader))
         ->userId($userId)
         ->ip()
-        ->trackId()
+        ->traceId()
         ->getRequest();
 }
 
@@ -63,7 +63,7 @@ function telemetry(Request $request, ?int $userId = null): Request
     return (new TelemetryRequest($request, new TelemetryHeader))
         ->userId($userId)
         ->ip()
-        ->trackId()
+        ->traceId()
         ->custom('Some-Header', fn (Request $request) => 1234
         ->getRequest();
 }
@@ -91,7 +91,7 @@ use DragonCode\Telemetry\TelemetryHeader;
 return new TelemetryHeader(
     userId: 'Some-User-Id',
     ip: 'Some-IP',
-    trackId: 'Some-Track-Id',
+    traceId: 'Some-Trace-Id',
 );
 ```
 
diff --git a/src/TelemetryHeader.php b/src/TelemetryHeader.php
index 051a4a7..42ab036 100644
--- a/src/TelemetryHeader.php
+++ b/src/TelemetryHeader.php
@@ -9,6 +9,6 @@
     public function __construct(
         public string $userId = 'X-Telemetry-User-Id',
         public string $ip = 'X-Telemetry-Ip',
-        public string $trackId = 'X-Telemetry-Track-Id',
+        public string $traceId = 'X-Telemetry-Trace-Id',
     ) {}
 }
diff --git a/src/TelemetryRequest.php b/src/TelemetryRequest.php
index f599f02..27074cd 100644
--- a/src/TelemetryRequest.php
+++ b/src/TelemetryRequest.php
@@ -53,18 +53,18 @@ public function getIp(): string
         return $this->get('HTTP_X_REAL_IP') ?: $this->request->getClientIp();
     }
 
-    public function trackId(?string $id = null): static
+    public function traceId(?string $id = null): static
     {
-        $id ??= $this->getTrackId();
+        $id ??= $this->getTraceId();
 
-        $this->set($this->header->trackId, $id);
+        $this->set($this->header->traceId, $id);
 
         return $this;
     }
 
-    public function getTrackId(): string
+    public function getTraceId(): string
     {
-        if ($id = $this->get($this->header->trackId)) {
+        if ($id = $this->get($this->header->traceId)) {
             return $id;
         }
 
diff --git a/tests/Unit/HeaderTest.php b/tests/Unit/HeaderTest.php
index 4626dd0..8393204 100644
--- a/tests/Unit/HeaderTest.php
+++ b/tests/Unit/HeaderTest.php
@@ -9,17 +9,17 @@
 
     expect($header->userId)->toBe('X-Telemetry-User-Id')
         ->and($header->ip)->toBe('X-Telemetry-Ip')
-        ->and($header->trackId)->toBe('X-Telemetry-Track-Id');
+        ->and($header->traceId)->toBe('X-Telemetry-Trace-Id');
 });
 
 it('accepts custom header names', function () {
     $header = new TelemetryHeader(
         userId : 'Some-User-Id',
         ip     : 'Some-IP',
-        trackId: 'Some-Track-Id',
+        traceId: 'Some-Trace-Id',
     );
 
     expect($header->userId)->toBe('Some-User-Id')
         ->and($header->ip)->toBe('Some-IP')
-        ->and($header->trackId)->toBe('Some-Track-Id');
+        ->and($header->traceId)->toBe('Some-Trace-Id');
 });
diff --git a/tests/Unit/Request/TrackIdTest.php b/tests/Unit/Request/TrackIdTest.php
index f592020..67278c7 100644
--- a/tests/Unit/Request/TrackIdTest.php
+++ b/tests/Unit/Request/TrackIdTest.php
@@ -6,27 +6,27 @@
 use DragonCode\Telemetry\TelemetryRequest;
 use Ramsey\Uuid\Uuid;
 
-it('gets or sets track id, generating a UUID v4 when absent', function () {
+it('gets or sets trace id, generating a UUID v4 when absent', function () {
     $header = new TelemetryHeader;
 
     // 1) If header exists, return it
-    $request   = makeRequest([$header->trackId => 'track-123']);
+    $request   = makeRequest([$header->traceId => 'trace-123']);
     $telemetry = new TelemetryRequest($request, $header);
-    expect($telemetry->getTrackId())->toBe('track-123');
+    expect($telemetry->getTraceId())->toBe('trace-123');
 
     // 2) When absent, generate UUID v4
     $request   = makeRequest();
     $telemetry = new TelemetryRequest($request, $header);
-    $generated = $telemetry->getTrackId();
+    $generated = $telemetry->getTraceId();
     expect(Uuid::isValid($generated))->toBeTrue()
         ->and(Uuid::fromString($generated)->getVersion())->toBe(4);
 
-    // 3) trackId() without param sets header using getTrackId()
-    $telemetry->trackId();
-    expect($request->headers->has($header->trackId))->toBeTrue()
-        ->and(Uuid::isValid($request->headers->get($header->trackId)))->toBeTrue();
+    // 3) traceId() without param sets header using getTraceId()
+    $telemetry->traceId();
+    expect($request->headers->has($header->traceId))->toBeTrue()
+        ->and(Uuid::isValid($request->headers->get($header->traceId)))->toBeTrue();
 
-    // 4) trackId() with explicit value sets header
-    $telemetry->trackId('manual-id');
-    expect($request->headers->get($header->trackId))->toBe('manual-id');
+    // 4) traceId() with explicit value sets header
+    $telemetry->traceId('manual-id');
+    expect($request->headers->get($header->traceId))->toBe('manual-id');
 });