diff --git a/01-basic.sh b/01-basic.sh
index da57b39..4d0631c 100755
--- a/01-basic.sh
+++ b/01-basic.sh
@@ -125,7 +125,7 @@ systemctl restart nginx
 #####
 
 # Install packages
-apt-get -y --no-install-recommends -y install postgresql-9.6 postgresql-9.6-postgis postgresql-contrib-9.6
+apt-get -y --no-install-recommends install postgresql-9.6 postgresql-9.6-postgis postgresql-contrib-9.6
 
 # Configure
 cp ${SOURCE_DIR}/basic/etc/postgresql/9.6/main/postgresql.conf /etc/postgresql/9.6/main/postgresql.conf