diff --git a/scripts/vagrant/install_postgres.sh b/scripts/vagrant/install_postgres.sh
index bb8d8cfc..1863ace1 100755
--- a/scripts/vagrant/install_postgres.sh
+++ b/scripts/vagrant/install_postgres.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -ex
 
-sudo apt-get install wget ca-certificates
+sudo apt-get install -y wget ca-certificates
 wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
 sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ `lsb_release -cs`-pgdg main" >> /etc/apt/sources.list.d/pgdg.list'