diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4fbb073
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/vendor/
+/composer.lock
diff --git a/AzureBlobStorageAdapter.php b/AzureBlobStorageAdapter.php
index 7842a58..7aa4d11 100644
--- a/AzureBlobStorageAdapter.php
+++ b/AzureBlobStorageAdapter.php
@@ -52,6 +52,7 @@ class AzureBlobStorageAdapter implements FilesystemAdapter, PublicUrlGenerator,
         'Metadata',
         'ContentLanguage',
         'ContentEncoding',
+        'ContentDisposition',
     ];
     const ON_VISIBILITY_THROW_ERROR = 'throw';
     const ON_VISIBILITY_IGNORE = 'ignore';