diff --git a/tools/gen_signatures_registry.ml b/tools/gen_signatures_registry.ml
index 3d3a4191..dc6a8ede 100644
--- a/tools/gen_signatures_registry.ml
+++ b/tools/gen_signatures_registry.ml
@@ -59,7 +59,16 @@ let registry_file = "registry.rec"
 let download () =
   let open Bos in
   let res =
-    OS.Cmd.run Cmd.(v "curl" % "-s" % "-o" % registry_file % "-X" % "GET" % url)
+    OS.Cmd.run
+      Cmd.(
+        v "curl"
+        % "--silent"
+        % "--show-error"
+        % "-o"
+        % registry_file
+        % "-X"
+        % "GET"
+        % url)
   in
   match res with
   | Error (`Msg s) -> Fmt.failwith "download failure: %s" s