diff --git a/src/Stream.php b/src/Stream.php
index d3bd78d..24e9350 100644
--- a/src/Stream.php
+++ b/src/Stream.php
@@ -260,8 +260,14 @@ public function getContents(): string
             throw new \RuntimeException('Stream is detached');
         }
 
-        if (false === $contents = @\stream_get_contents($this->stream)) {
-            throw new \RuntimeException('Unable to read stream contents: ' . (\error_get_last()['message'] ?? ''));
+        $contents = '';
+
+        while (!\feof($this->stream)) {
+            if (false === $result = @\fread($this->stream, 16372)) {
+                throw new \RuntimeException('Unable to read from stream: ' . (\error_get_last()['message'] ?? ''));
+            }
+
+            $contents .= $result;
         }
 
         return $contents;