diff --git a/src/Connection/StreamConnection.php b/src/Connection/StreamConnection.php
index 9c26272d..5af9a89e 100644
--- a/src/Connection/StreamConnection.php
+++ b/src/Connection/StreamConnection.php
@@ -387,7 +387,7 @@ class StreamConnection extends AbstractConnection
         $buffer = "*{$reqlen}\r\n\${$cmdlen}\r\n{$commandID}\r\n";
 
         foreach ($arguments as $argument) {
-            $arglen = strlen($argument);
+            $arglen = strlen(strval($argument));
             $buffer .= "\${$arglen}\r\n{$argument}\r\n";
         }