diff --git a/src/FpmRuntime/FpmHandler.php b/src/FpmRuntime/FpmHandler.php
index caa1ef145..3e80e2d36 100644
--- a/src/FpmRuntime/FpmHandler.php
+++ b/src/FpmRuntime/FpmHandler.php
@@ -197,6 +197,8 @@ private function ensureStillRunning(): void
     }
 
     /**
+     * @see https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtime-environment.html#runtimes-lifecycle-ib
+     *
      * @throws Exception
      */
     private function waitUntilReady(): void
@@ -205,6 +207,10 @@ private function waitUntilReady(): void
         $timeout = 5000000; // 5 secs
         $elapsed = 0;
 
+        if ($_SERVER['BREF_FPM_READY_TIMEOUT'] ?? false) {
+            $timeout = (int) $_SERVER['BREF_FPM_READY_TIMEOUT'];
+        }
+
         while (! $this->isReady()) {
             usleep($wait);
             $elapsed += $wait;