diff --git a/src/Modules/LibreOffice.php b/src/Modules/LibreOffice.php
index fc37514..e455a94 100644
--- a/src/Modules/LibreOffice.php
+++ b/src/Modules/LibreOffice.php
@@ -31,6 +31,16 @@ public function index(Index $index): self
         return $this;
     }
 
+    /**
+     * Sets the password for opening the source file.
+     */
+    public function password(string $password): self
+    {
+        $this->formValue('password', $password);
+
+        return $this;
+    }
+
     /**
      * Sets the paper orientation to landscape.
      */
diff --git a/tests/Modules/LibreOfficeTest.php b/tests/Modules/LibreOfficeTest.php
index 05adbce..471612b 100644
--- a/tests/Modules/LibreOfficeTest.php
+++ b/tests/Modules/LibreOfficeTest.php
@@ -15,6 +15,7 @@
      */
     function (
         array $files,
+        string|null $password = null,
         bool $landscape = false,
         string|null $nativePageRanges = null,
         bool|null $exportFormFields = null,
@@ -43,6 +44,10 @@ function (
     ): void {
         $libreOffice = Gotenberg::libreOffice('');
 
+        if ($password !== null) {
+            $libreOffice->password($password);
+        }
+
         if ($landscape) {
             $libreOffice->landscape();
         }
@@ -149,6 +154,7 @@ function (
         $body    = sanitize($request->getBody()->getContents());
 
         expect($request->getUri()->getPath())->toBe('/forms/libreoffice/convert');
+        expect($body)->unless($password === null, fn ($body) => $body->toContainFormValue('password', $password));
         expect($body)->unless($landscape === false, fn ($body) => $body->toContainFormValue('landscape', '1'));
         expect($body)->unless($nativePageRanges === null, fn ($body) => $body->toContainFormValue('nativePageRanges', $nativePageRanges));
         expect($body)->unless($exportFormFields === null, fn ($body) => $body->toContainFormValue('exportFormFields', $exportFormFields === true ? '1' : '0'));
@@ -201,6 +207,7 @@ function (
             Stream::string('my.docx', 'Word content'),
             Stream::string('my_second.docx', 'Second Word content'),
         ],
+        'foo',
         true,
         '1-2',
         false,