diff --git a/debian/changelog b/debian/changelog
index 280c8552dc7afa0b8dc3221b9907f6c1c8f00fb6..0c02722d00340cecf35d0e3ec8b373b6495d58b0 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+latex-theme-tpt (0.9.1-2) UNRELEASED; urgency=medium
+
+  * Make dependency on tex-common more explicit, override version.
+
+ -- Cedric Ware <cedric.ware@telecom-paristech.fr>  Fri, 31 Jul 2020 15:50:00 +0200
+
 latex-theme-tpt (0.9.1-1) UNRELEASED; urgency=medium
 
   * Initial debian packaging.
diff --git a/debian/control b/debian/control
index d26e27b59ead624cb5ab0dabbf1bf029e5009a0a..b21862cdf288007c08f4e906d32b9afc1a53ec86 100644
--- a/debian/control
+++ b/debian/control
@@ -2,7 +2,7 @@ Source: latex-theme-tpt
 Section: tex
 Priority: optional
 Maintainer: Cedric Ware <cedric.ware@telecom-paristech.fr>
-Build-Depends: debhelper (>= 9.0.0), texlive-pictures (>= 2016), texlive-latex-recommended (>= 2016), texlive-latex-extra (>= 2016), fig2dev, latex-make, latexmk
+Build-Depends: debhelper (>= 9.0.0), tex-common, texlive-pictures (>= 2016), texlive-latex-recommended (>= 2016), texlive-latex-extra (>= 2016), fig2dev, latex-make, latexmk
 Standards-Version: 3.9.3
 
 Package: latex-theme-tpt
diff --git a/debian/rules b/debian/rules
index b0486a91dd7ffc794e537190f6cd52efda756033..20f9f172d1da569028f882094355c96ecf14dbe3 100755
--- a/debian/rules
+++ b/debian/rules
@@ -5,3 +5,10 @@
 override_dh_auto_install:
 	$(MAKE) -f $$(pwd)/debian/packaging.mk prefix=$$(pwd)/debian/latex-theme-tpt/usr install-tex
 	$(MAKE) -f $$(pwd)/debian/packaging.mk prefix=$$(pwd)/debian/latex-theme-tpt-doc-fr/usr install-doc
+
+# dh_installtex adds a dependency to the currently-installed tex-common
+# version, but we may want to install the package onto older systems.
+override_dh_installtex:
+	dh_installtex
+	perl -pi.orig -E 's{(tex-common\s+)\((.*?)\)}{$${1}(>= 6.06)}g' \
+		debian/*.substvars