diff -Nru dlt-viewer-2.21.2+dfsg/debian/changelog dlt-viewer-2.21.2+dfsg/debian/changelog
--- dlt-viewer-2.21.2+dfsg/debian/changelog	2021-03-27 08:29:15.000000000 +0000
+++ dlt-viewer-2.21.2+dfsg/debian/changelog	2021-04-04 09:22:20.000000000 +0000
@@ -1,3 +1,9 @@
+dlt-viewer (2.21.2+dfsg-2) unstable; urgency=medium
+
+  * Revert compat level bump to let package migrate to testing.
+
+ -- Gianfranco Costamagna <locutusofborg@debian.org>  Sun, 04 Apr 2021 11:22:20 +0200
+
 dlt-viewer (2.21.2+dfsg-1) unstable; urgency=medium
 
   * New upstream version 2.21.2+dfsg
diff -Nru dlt-viewer-2.21.2+dfsg/debian/control dlt-viewer-2.21.2+dfsg/debian/control
--- dlt-viewer-2.21.2+dfsg/debian/control	2021-03-27 08:29:15.000000000 +0000
+++ dlt-viewer-2.21.2+dfsg/debian/control	2021-04-04 09:22:19.000000000 +0000
@@ -5,7 +5,7 @@
 Uploaders: Bruno "Fuddl" Kleinert <fuddl@debian.org>,
  Aigars Mahinovs <aigarius@debian.org>,
  Gianfranco Costamagna <locutusofborg@debian.org>
-Build-Depends: debhelper-compat (= 13),
+Build-Depends: debhelper-compat (= 12),
  qtbase5-dev,
  qtdeclarative5-dev,
  libqt5serialport5-dev,