diff --git a/Install_PostgreSQL_13_and_PostGIS_3.md b/Install_PostgreSQL_13_and_PostGIS_3.md
index 8cb42b2..1f3eff5 100644
--- a/Install_PostgreSQL_13_and_PostGIS_3.md
+++ b/Install_PostgreSQL_13_and_PostGIS_3.md
@@ -78,7 +78,14 @@ to get the commandline tools shp2pgsql, raster2pgsql you need to do this: \
 
 
 # Install pgadmin4 desktop
-`sudo apt install pgadmin4-desktop` \
+```
+sudo curl https://www.pgadmin.org/static/packages_pgadmin_org.pub | sudo apt-key add
+sudo sh -c 'echo "deb https://ftp.postgresql.org/pub/pgadmin/pgadmin4/apt/$(lsb_release -cs) pgadmin4 main" > /etc/apt/sources.list.d/pgadmin4.list'
+sudo apt update
+```
+
+`sudo apt install pgadmin4-desktop` 
+
 ```
 The following additional packages will be installed:
   libfile-basedir-perl libfile-desktopentry-perl libfile-mimeinfo-perl