diff --git a/ExecutableFinder.php b/ExecutableFinder.php
index f044ebc0..2f0f68c1 100644
--- a/ExecutableFinder.php
+++ b/ExecutableFinder.php
@@ -69,7 +69,7 @@ public function find(string $name, string $default = null, array $extraDirs = []
         }
 
         $command = '\\' === \DIRECTORY_SEPARATOR ? 'where' : 'command -v';
-        if (\function_exists('exec') && ($executablePath = strtok(@exec($command.' '.escapeshellarg($name)), \PHP_EOL)) && is_executable($executablePath)) {
+        if (\function_exists('exec') && ($executablePath = strtok(@exec($command.' '.escapeshellarg($name)), \PHP_EOL)) && @is_executable($executablePath)) {
             return $executablePath;
         }
 
diff --git a/Pipes/WindowsPipes.php b/Pipes/WindowsPipes.php
index 637c8f38..8033442a 100644
--- a/Pipes/WindowsPipes.php
+++ b/Pipes/WindowsPipes.php
@@ -140,7 +140,7 @@ public function readAndWrite(bool $blocking, bool $close = false): array
             if ($w) {
                 @stream_select($r, $w, $e, 0, Process::TIMEOUT_PRECISION * 1E6);
             } elseif ($this->fileHandles) {
-                usleep(Process::TIMEOUT_PRECISION * 1E6);
+                usleep((int) (Process::TIMEOUT_PRECISION * 1E6));
             }
         }
         foreach ($this->fileHandles as $type => $fileHandle) {