diff --git a/debian/changelog b/debian/changelog
index 9366537..da31793 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,18 +1,19 @@
 monitoring-plugins-systemd (2.3.1-1) UNRELEASED; urgency=medium
 
   * New upstream release.
   * Stop repacking the upstream tarball, as upstream fixed the problem.
+  * d/watch: upstream now signs tags, verify them.
 
  -- Louis-Philippe Véronneau <pollo@debian.org>  Thu, 04 Mar 2021 16:17:40 -0500
 
 monitoring-plugins-systemd (2.3.0+ds-2) unstable; urgency=medium
 
   * Run the complete upstream testsuite, at build and in the autopkgtest.
 
  -- Louis-Philippe Véronneau <pollo@debian.org>  Sun, 28 Feb 2021 16:36:21 -0500
 
 monitoring-plugins-systemd (2.3.0+ds-1) unstable; urgency=medium
 
   * Initial release. (Closes: #982667, #895278)
 
  -- Louis-Philippe Véronneau <pollo@debian.org>  Fri, 19 Feb 2021 23:18:00 -0500
diff --git a/debian/upstream/signing-key.asc b/debian/upstream/signing-key.asc
new file mode 100644
index 0000000..b5d1e1b
--- /dev/null
+++ b/debian/upstream/signing-key.asc
@@ -0,0 +1,91 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Comment: GPGTools - https://gpgtools.org</code>
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diff --git a/debian/watch b/debian/watch
index dc692c6..82c6852 100644
--- a/debian/watch
+++ b/debian/watch
@@ -1,4 +1,4 @@
 version=4
-opts="mode=git, uversionmangle=s/v//" \
+opts="mode=git, pgpmode=gittag, uversionmangle=s/v//" \
 https://github.com/Josef-Friedrich/check_systemd.git \
 refs/tags/([v\d\.]+)