diff --git a/lib/api/azure/file.ex b/lib/api/azure/file.ex
index d167e29..e3719b3 100644
--- a/lib/api/azure/file.ex
+++ b/lib/api/azure/file.ex
@@ -12,11 +12,13 @@ defmodule FileStorageApi.API.Azure.File do
 
   @impl true
   def upload(container_name, connection, filename, blob_name, opts \\ []) do
+    converted_opts = convert_opts(opts)
+
     case Blob.upload_file(
            container(container_name, connection),
            filename,
            blob_name,
-           Enum.into(opts, %{})
+           converted_opts
          ) do
       {:ok, %{request_url: _request_url}} ->
         {:ok, blob_name || Path.basename(filename)}
@@ -83,4 +85,13 @@ defmodule FileStorageApi.API.Azure.File do
 
   defp storage_protocol(%{is_development_factory: true}), do: "http"
   defp storage_protocol(_context), do: "https"
+
+  defp convert_opts(opts) do
+    Map.new(opts, fn {key, value} ->
+      case key do
+        :meta -> {key, Enum.map(value, fn {k, v} -> {String.replace(k, "-", "_"), v} end)}
+        _ -> {key, value}
+      end
+    end)
+  end
 end
diff --git a/mix.exs b/mix.exs
index ca94b19..7971041 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,7 +4,7 @@ defmodule FileStorageApi.MixProject do
   def project do
     [
       app: :file_storage_api,
-      version: "2.3.2",
+      version: "2.3.3",
       elixir: "~> 1.10",
       elixirc_paths: elixirc_paths(Mix.env()),
       elixirc_options: [warnings_as_errors: Mix.env() != :test],