diff --git a/src/Worker/Transport/Command/Client/Request.php b/src/Worker/Transport/Command/Client/Request.php
index d39819961..8da82a2f1 100644
--- a/src/Worker/Transport/Command/Client/Request.php
+++ b/src/Worker/Transport/Command/Client/Request.php
@@ -18,6 +18,8 @@
 use Temporal\Worker\Transport\Command\Common\RequestTrait;
 use Temporal\Worker\Transport\Command\RequestInterface;
 
+\define(['REQUEST_START_ID'][0], (int) (\microtime(true) * 1_000_000.0));
+
 /**
  * Carries request to perform host action with payloads and failure as context. Can be cancelled if allows
  *
@@ -27,7 +29,7 @@ class Request implements RequestInterface
 {
     use RequestTrait;
 
-    protected static int $lastID = 9000;
+    protected static int $lastID = REQUEST_START_ID;
     protected int $id;
     protected ValuesInterface $payloads;
     protected HeaderInterface $header;
@@ -65,12 +67,12 @@ public function getFailure(): ?\Throwable
 
     private function getNextID(): int
     {
-        $next = ++static::$lastID;
+        ++static::$lastID;
 
-        if ($next >= \PHP_INT_MAX) {
-            $next = static::$lastID = 1;
+        if (static::$lastID === \PHP_INT_MAX) {
+            static::$lastID = 1;
         }
 
-        return $next;
+        return static::$lastID;
     }
 }
diff --git a/tests/Fixtures/CommandResetter.php b/tests/Fixtures/CommandResetter.php
index afb13f529..244ae0ff2 100644
--- a/tests/Fixtures/CommandResetter.php
+++ b/tests/Fixtures/CommandResetter.php
@@ -15,7 +15,7 @@
 
 class CommandResetter extends Request
 {
-    public static function reset()
+    public static function reset(): void
     {
         self::$lastID = 9000;
     }