diff --git a/src/Services/PdfGenerator.php b/src/Services/PdfGenerator.php
index fce4d32..6e91688 100644
--- a/src/Services/PdfGenerator.php
+++ b/src/Services/PdfGenerator.php
@@ -52,7 +52,8 @@ class PdfGenerator
         $pdfFile = tempnam($this->config['tmp_dir'], 'pdf_') . '.pdf';
 
         try {
-            $cmd = escapeshellcmd($this->config['pagedjs_bin']);
+            $cmd = 'TMPDIR=' . escapeshellarg($this->config['tmp_dir']) . ' ';
+            $cmd .= escapeshellcmd($this->config['pagedjs_bin']);
             $cmd .= ' ' . escapeshellarg($url);
             $cmd .= ' -o ' . escapeshellarg($pdfFile);
 
@@ -110,7 +111,8 @@ class PdfGenerator
 
     private function buildCommand(string $htmlFile, string $pdfFile, array $options): string
     {
-        $cmd = escapeshellcmd($this->config['pagedjs_bin']);
+        $cmd = 'TMPDIR=' . escapeshellarg($this->config['tmp_dir']) . ' ';
+        $cmd .= escapeshellcmd($this->config['pagedjs_bin']);
         $cmd .= ' ' . escapeshellarg($htmlFile);
         $cmd .= ' -o ' . escapeshellarg($pdfFile);