diff --git a/Dockerfile b/Dockerfile
index d83e187..6061d94 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -40,3 +40,4 @@ RUN grass --tmp-location EPSG:4326 --exec g.extension r.import.ndsm_nrw url=/src
 RUN grass --tmp-location EPSG:4326 --exec g.extension m.import.rvr url=/src/grass-gis-addons/m.import.rvr -s
 RUN grass --tmp-location EPSG:4326 --exec g.extension m.analyse.trees url=/src/grass-gis-addons/m.analyse.trees -s
 RUN grass --tmp-location EPSG:4326 --exec g.extension m.analyse.buildings url=/src/grass-gis-addons/m.analyse.buildings -s
+RUN grass --tmp-location EPSG:4326 --exec g.extension r.dem.import url=https://github.com/mundialis/r.dem.import -s