diff --git a/src/ProtocolStreamReader.php b/src/ProtocolStreamReader.php
index 699fb3c..2d0e351 100644
--- a/src/ProtocolStreamReader.php
+++ b/src/ProtocolStreamReader.php
@@ -6,7 +6,6 @@ namespace LanguageServer;
 use LanguageServer\Protocol\Message;
 use AdvancedJsonRpc\Message as MessageBody;
 use Sabre\Event\Loop;
-use RuntimeException;
 
 class ProtocolStreamReader implements ProtocolReader
 {
@@ -26,11 +25,8 @@ class ProtocolStreamReader implements ProtocolReader
     public function __construct($input)
     {
         $this->input = $input;
-        Loop\addReadStream($this->input, function () {
-            if (feof($this->input)) {
-                throw new RuntimeException('Stream is closed');
-            }
 
+        Loop\addReadStream($this->input, function () {
             while (($c = fgetc($this->input)) !== false && $c !== '') {
                 $this->buffer .= $c;
                 switch ($this->parsingMode) {
diff --git a/src/ProtocolStreamWriter.php b/src/ProtocolStreamWriter.php
index cee9b60..2ac3579 100644
--- a/src/ProtocolStreamWriter.php
+++ b/src/ProtocolStreamWriter.php
@@ -4,6 +4,7 @@ declare(strict_types = 1);
 namespace LanguageServer;
 
 use LanguageServer\Protocol\Message;
+use RuntimeException;
 
 class ProtocolStreamWriter implements ProtocolWriter
 {
@@ -30,7 +31,16 @@ class ProtocolStreamWriter implements ProtocolWriter
         $totalBytesWritten = 0;
 
         while ($totalBytesWritten < $msgSize) {
-            $bytesWritten = fwrite($this->output, substr($data, $totalBytesWritten));
+            error_clear_last();
+            $bytesWritten = @fwrite($this->output, substr($data, $totalBytesWritten));
+            if ($bytesWritten === false) {
+                $error = error_get_last();
+                if ($error !== null) {
+                    throw new RuntimeException('Could not write message: ' . error_get_last()['message']);
+                } else {
+                    throw new RuntimeException('Could not write message');
+                }
+            }
             $totalBytesWritten += $bytesWritten;
         }
     }