diff --git a/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php b/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
index 7570126fa80eb..e60a21d2644a0 100644
--- a/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
+++ b/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
@@ -117,6 +117,6 @@ private function isNamedArguments(Node $arguments): bool
 
     private function getVarName(): string
     {
-        return sprintf('__internal_%s', hash('sha256', uniqid(mt_rand(), true), false));
+        return sprintf('__internal_%s', hash('sha256', uniqid((string) mt_rand(), true), false));
     }
 }
diff --git a/src/Symfony/Component/DomCrawler/Field/FileFormField.php b/src/Symfony/Component/DomCrawler/Field/FileFormField.php
index bd97e7688ea13..999a5388486d5 100644
--- a/src/Symfony/Component/DomCrawler/Field/FileFormField.php
+++ b/src/Symfony/Component/DomCrawler/Field/FileFormField.php
@@ -55,7 +55,7 @@ public function setValue(?string $value)
             $name = $info['basename'];
 
             // copy to a tmp location
-            $tmp = sys_get_temp_dir().'/'.strtr(substr(base64_encode(hash('sha256', uniqid(mt_rand(), true), true)), 0, 7), '/', '_');
+            $tmp = sys_get_temp_dir().'/'.strtr(substr(base64_encode(hash('sha256', uniqid((string) mt_rand(), true), true)), 0, 7), '/', '_');
             if (\array_key_exists('extension', $info)) {
                 $tmp .= '.'.$info['extension'];
             }
diff --git a/src/Symfony/Component/Filesystem/Filesystem.php b/src/Symfony/Component/Filesystem/Filesystem.php
index c5cfa47140052..0e369ac16f184 100644
--- a/src/Symfony/Component/Filesystem/Filesystem.php
+++ b/src/Symfony/Component/Filesystem/Filesystem.php
@@ -640,7 +640,7 @@ public function tempnam(string $dir, string $prefix/* , string $suffix = '' */)
         // Loop until we create a valid temp file or have reached 10 attempts
         for ($i = 0; $i < 10; ++$i) {
             // Create a unique filename
-            $tmpFile = $dir.'/'.$prefix.uniqid(mt_rand(), true).$suffix;
+            $tmpFile = $dir.'/'.$prefix.uniqid((string) mt_rand(), true).$suffix;
 
             // Use fopen instead of file_exists as some streams do not support stat
             // Use mode 'x+' to atomically check existence and create to avoid a TOCTOU vulnerability
diff --git a/src/Symfony/Component/HttpKernel/Debug/TraceableEventDispatcher.php b/src/Symfony/Component/HttpKernel/Debug/TraceableEventDispatcher.php
index fd1cf9e5845d6..8e37110da2d8e 100644
--- a/src/Symfony/Component/HttpKernel/Debug/TraceableEventDispatcher.php
+++ b/src/Symfony/Component/HttpKernel/Debug/TraceableEventDispatcher.php
@@ -30,7 +30,7 @@ protected function beforeDispatch(string $eventName, object $event)
     {
         switch ($eventName) {
             case KernelEvents::REQUEST:
-                $event->getRequest()->attributes->set('_stopwatch_token', substr(hash('sha256', uniqid(mt_rand(), true)), 0, 6));
+                $event->getRequest()->attributes->set('_stopwatch_token', substr(hash('sha256', uniqid((string) mt_rand(), true)), 0, 6));
                 $this->stopwatch->openSection();
                 break;
             case KernelEvents::VIEW:
diff --git a/src/Symfony/Component/HttpKernel/Profiler/Profiler.php b/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
index 412a85925138d..88149dddd857b 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
@@ -140,7 +140,7 @@ public function collect(Request $request, Response $response, ?\Throwable $excep
             return null;
         }
 
-        $profile = new Profile(substr(hash('sha256', uniqid(mt_rand(), true)), 0, 6));
+        $profile = new Profile(substr(hash('sha256', uniqid((string) mt_rand(), true)), 0, 6));
         $profile->setTime(time());
         $profile->setUrl($request->getUri());
         $profile->setMethod($request->getMethod());