diff --git a/postgres-appliance/Dockerfile b/postgres-appliance/Dockerfile
index b140cb5a..272d7004 100644
--- a/postgres-appliance/Dockerfile
+++ b/postgres-appliance/Dockerfile
@@ -54,7 +54,7 @@ ARG WITH_PERL=false
 ARG DEB_PG_SUPPORTED_VERSIONS="$PGOLDVERSIONS $PGVERSION"
 
 # Install PostgreSQL, extensions and contribs
-ENV POSTGIS_VERSION=3.4 \
+ENV POSTGIS_VERSION=3.5 \
     BG_MON_COMMIT=ef60961eff92672b1e21f5260dc1211367da6f1f \
     PG_AUTH_MON_COMMIT=3d010e5959285c32b155e8064c9c9b57869aeca7 \
     PG_MON_COMMIT=a6c5982368edd876edbee01e51b91e7387071e21 \