diff --git a/p/haskell-hmatrix-gsl/debian/changelog b/p/haskell-hmatrix-gsl/debian/changelog
index 4befbf6e47..f580852dd2 100644
--- a/p/haskell-hmatrix-gsl/debian/changelog
+++ b/p/haskell-hmatrix-gsl/debian/changelog
@@ -1,3 +1,12 @@
+haskell-hmatrix-gsl (0.19.0.1-4) UNRELEASED; urgency=medium
+
+ * Update watch file format version to 4.
+ * Set upstream metadata fields: Archive, Bug-Database, Bug-Submit,
+ Repository-Browse.
+ * Update standards version to 4.6.2, no changes needed.
+
+ -- Debian Janitor <janitor@jelmer.uk> Thu, 11 May 2023 22:05:20 -0000
+
haskell-hmatrix-gsl (0.19.0.1-3) unstable; urgency=medium
* Declare compliance with Debian policy 4.6.1
diff --git a/p/haskell-hmatrix-gsl/debian/control b/p/haskell-hmatrix-gsl/debian/control
index 807b93e0a5..a0ec92b7a8 100644
--- a/p/haskell-hmatrix-gsl/debian/control
+++ b/p/haskell-hmatrix-gsl/debian/control
@@ -24,7 +24,7 @@ Build-Depends-Indep:
libghc-hmatrix-doc,
libghc-random-doc,
libghc-vector-doc,
-Standards-Version: 4.6.1
+Standards-Version: 4.6.2
Vcs-Browser: https://salsa.debian.org/haskell-team/DHG_packages/tree/master/p/haskell-hmatrix-gsl
Vcs-Git: https://salsa.debian.org/haskell-team/DHG_packages.git [p/haskell-hmatrix-gsl]
Homepage: https://github.com/albertoruiz/hmatrix
diff --git a/p/haskell-hmatrix-gsl/debian/upstream/metadata b/p/haskell-hmatrix-gsl/debian/upstream/metadata
new file mode 100644
index 0000000000..4050ac82f6
--- /dev/null
+++ b/p/haskell-hmatrix-gsl/debian/upstream/metadata
@@ -0,0 +1,5 @@
+---
+Archive: Hackage
+Bug-Database: https://github.com/haskell-numerics/hmatrix/issues
+Bug-Submit: https://github.com/haskell-numerics/hmatrix/issues/new
+Repository-Browse: https://github.com/haskell-numerics/hmatrix
diff --git a/p/haskell-hmatrix-gsl/debian/watch b/p/haskell-hmatrix-gsl/debian/watch
index 8c3354a5ac..0c27330974 100644
--- a/p/haskell-hmatrix-gsl/debian/watch
+++ b/p/haskell-hmatrix-gsl/debian/watch
@@ -1,2 +1,2 @@
-version=3
+version=4
https://hackage.haskell.org/package/hmatrix-gsl/distro-monitor .*-([0-9\.]+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))
