diff --git a/lib/web/media_proxy.ex b/lib/web/media_proxy.ex
index 9e6512df9..549f0918d 100644
--- a/lib/web/media_proxy.ex
+++ b/lib/web/media_proxy.ex
@@ -58,7 +58,7 @@ defmodule Mobilizon.Web.MediaProxy do
   end
 
   defp signed_url(url) do
-    :crypto.hmac(:sha, Config.get([Web.Endpoint, :secret_key_base]), url)
+    :crypto.mac(:hmac, :sha, Config.get([Web.Endpoint, :secret_key_base]), url)
   end
 
   def filename(url_or_path) do