diff --git a/debian/changelog b/debian/changelog
index 8fc3cf8..c6b0770 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,11 @@
+ocaml-stdio (0.16.0-2) UNRELEASED; urgency=medium
+
+ * Update watch file format version to 4.
+ * Set upstream metadata fields: Bug-Database, Bug-Submit, Repository,
+ Repository-Browse.
+
+ -- Debian Janitor <janitor@jelmer.uk> Mon, 03 Jul 2023 09:40:48 -0000
+
ocaml-stdio (0.16.0-1) unstable; urgency=medium
* Team upload.
diff --git a/debian/upstream/metadata b/debian/upstream/metadata
new file mode 100644
index 0000000..6783f19
--- /dev/null
+++ b/debian/upstream/metadata
@@ -0,0 +1,5 @@
+---
+Bug-Database: https://github.com/janestreet/stdio/issues
+Bug-Submit: https://github.com/janestreet/stdio/issues/new
+Repository: https://github.com/janestreet/stdio.git
+Repository-Browse: https://github.com/janestreet/stdio
diff --git a/debian/watch b/debian/watch
index ad581f5..01292e2 100644
--- a/debian/watch
+++ b/debian/watch
@@ -1,2 +1,2 @@
-version=3
+version=4
https://github.com/janestreet/stdio/tags .*/v(.*)\.tar\.gz
