diff --git a/helpers/make-thunderbird b/helpers/make-thunderbird
index 0d88bfdb49f6e483d306e127d7892679173ea10f..dbb55a52c23d44b072808d24b5236cae7b6d7fcf 100644
--- a/helpers/make-thunderbird
+++ b/helpers/make-thunderbird
@@ -256,7 +256,7 @@ find -name aboutRights.xhtml |xargs sed -i "/rights-intro-point-5/d"
 find -name aboutRights.xhtml |xargs sed -i "/rights-intro-point-6/d"
 find -name aboutRights-unbranded.xhtml |xargs sed -i "/rights-intro-point-5/d"
 
-sed -i 's/<a\ href\=\"http\:\/\/www.icedove.net\/\">Icedove\ Project<\/a>/<a\ href\=\"http\:\/\/www.trisquel.info\/\"\>Trisquel\ Project<\/a>/g' \
+sed -i 's/<a\ href\=\"https\:\/\/www.icedove.net\/\">Icedove\ Project<\/a>/<a\ href\=\"https\:\/\/www.trisquel.info\/\"\>Trisquel\ Project<\/a>/g' \
     comm/mail/base/content/overrides/app-license.html
 #EO about: mods.