diff --git a/lib/vos/drivers/s3.rb b/lib/vos/drivers/s3.rb
index 62ce11b..36aa181 100644
--- a/lib/vos/drivers/s3.rb
+++ b/lib/vos/drivers/s3.rb
@@ -10,7 +10,7 @@ class S3
       def initialize options = {}
         options = options.clone
         @bucket_name = options.delete(:bucket) || raise("S3 bucket not provided!")
-        @acl = options.delete(:acl) || :public_read
+        @write_options = {:acl => :public_read}.merge(options.delete(:write_options))
         @options = options
       end
 
@@ -57,7 +57,7 @@ def _clear
       end
 
       protected
-        attr_reader :options, :bucket_name, :acl
+        attr_reader :options, :bucket_name, :write_options
     end
   end
-end
\ No newline at end of file
+end
diff --git a/lib/vos/drivers/s3_vfs_storage.rb b/lib/vos/drivers/s3_vfs_storage.rb
index 283bedb..aefef03 100644
--- a/lib/vos/drivers/s3_vfs_storage.rb
+++ b/lib/vos/drivers/s3_vfs_storage.rb
@@ -58,11 +58,11 @@ def write_file original_path, append, &block
           writer = Writer.new
           writer.write file.read if file.exists?
           block.call writer
-          file.write writer.data, acl: acl
+          file.write writer.data, write_options
         else
           writer = Writer.new
           block.call writer
-          file.write writer.data, acl: acl
+          file.write writer.data, write_options
         end
       end
 
@@ -144,4 +144,4 @@ def normalize_path path
         end
     end
   end
-end
\ No newline at end of file
+end