diff --git a/lib/pleroma/helpers/media_helper.ex b/lib/pleroma/helpers/media_helper.ex
index 5fe135584..01f42d9b0 100644
--- a/lib/pleroma/helpers/media_helper.ex
+++ b/lib/pleroma/helpers/media_helper.ex
@@ -11,7 +11,7 @@ def image_resize(url, %{max_width: max_width, max_height: max_height} = options)
     quality = options[:quality] || 85
 
     cmd = ~s"""
-    convert - -resize '#{max_width}x#{max_height}>' -quality #{quality} -
+    convert fd:0 -resize '#{max_width}x#{max_height}>' -quality #{quality} jpg:-
     """
 
     pid = Port.open({:spawn, cmd}, [:use_stdio, :stream, :exit_status, :binary])