diff -Nru libgdal-grass-3.0.4/debian/changelog libgdal-grass-3.0.4/debian/changelog
--- libgdal-grass-3.0.4/debian/changelog	2020-12-23 15:13:04.000000000 +0000
+++ libgdal-grass-3.0.4/debian/changelog	2021-10-16 07:22:21.000000000 +0000
@@ -1,3 +1,10 @@
+libgdal-grass (3.0.4-1~bionic4) bionic; urgency=medium
+
+  * Rebuild for bionic.
+  * Bump GRASS GIS version to 7.8.6
+
+ -- Martin Landa <landa.martin@gmail.com>  Sat, 16 Oct 2021 09:22:21 +0200
+
 libgdal-grass (3.0.4-1~bionic3) bionic; urgency=medium
 
   * Rebuild for bionic.
diff -Nru libgdal-grass-3.0.4/debian/control libgdal-grass-3.0.4/debian/control
--- libgdal-grass-3.0.4/debian/control	2020-12-23 15:12:55.000000000 +0000
+++ libgdal-grass-3.0.4/debian/control	2021-10-16 07:22:00.000000000 +0000
@@ -7,8 +7,8 @@
 Build-Depends: debhelper (>= 9),
                dh-autoreconf,
                d-shlibs,
-               grass (>= 7.8.5),
-               grass-dev (>= 7.8.5),
+               grass (>= 7.8.6),
+               grass-dev (>= 7.8.6),
                libgdal-dev (>= 3.0.4),
                libpq-dev,
                lsb-release,