diff --git a/02-sahana.sh b/02-sahana.sh
index 643a465..c51e5a2 100755
--- a/02-sahana.sh
+++ b/02-sahana.sh
@@ -33,7 +33,7 @@ export SAHANA_HMAC=$(head -c 18 /dev/urandom | base64)
 envsubst <${SOURCE_DIR}/sahana/srv/sahana/applications/eden/models/000_config.py >/srv/sahana/applications/eden/models/000_config.py
 cp ${SOURCE_DIR}/sahana/srv/sahana/applications/eden/modules/templates/default/config.py /srv/sahana/applications/eden/modules/templates/default/config.py
 export SAHANA_ADMIN_USER=admin@example.com
-export SAHANA_ADMIN_PWD=$(head -c 18 /dev/urandom | base64)
+export SAHANA_ADMIN_PWD=$(head -c 12 /dev/urandom | base64)
 envsubst <${SOURCE_DIR}/sahana/srv/sahana/applications/eden/modules/templates/default/users/masterUsers.csv >/srv/sahana/applications/eden/modules/templates/default/users/masterUsers.csv
 cp ${SOURCE_DIR}/sahana/srv/sahana/applications/eden/languages/cs.py /srv/sahana/applications/eden/languages/cs.py
 
diff --git a/10-seeddms.sh b/10-seeddms.sh
index 912e904..75b71f5 100755
--- a/10-seeddms.sh
+++ b/10-seeddms.sh
@@ -12,7 +12,7 @@ mv /srv/seeddms51x /srv/seeddms
 rm -f /srv/seeddms.tgz
 
 # Populate database
-export SEEDDMS_PWD=$(head -c 260 /dev/urandom | tr -cd '[:alnum:]' | head -c 26)
+export SEEDDMS_PWD=$(head -c 18 /dev/urandom | base64)
 envsubst <${SOURCE_DIR}/seeddms/tmp/seeddms-createdb.sql >/tmp/seeddms-createdb.sql
 sudo -u postgres psql -f /tmp/seeddms-createdb.sql
 rm -f /tmp/seeddms-createdb.sql
diff --git a/50-pandora.sh b/50-pandora.sh
index 1927401..f86cbdc 100755
--- a/50-pandora.sh
+++ b/50-pandora.sh
@@ -31,13 +31,13 @@ cd /srv/pandora/src/python-ox && /srv/pandora/bin/python setup.py develop
 /srv/pandora/bin/pip install -r /srv/pandora/requirements.txt
 
 # Create PostgreSQL user and database
-export PANDORA_PWD=$(head -c 260 /dev/urandom | tr -cd '[:alnum:]' | head -c 26)
+export PANDORA_PWD=$(head -c 18 /dev/urandom | base64)
 envsubst <${SOURCE_DIR}/pandora/tmp/pandora-createdb.sql >/tmp/pandora-createdb.sql
 sudo -u postgres psql -f /tmp/pandora-createdb.sql
 rm -f /tmp/pandora-createdb.sql
 
 # Configure RabbitMQ
-export PANDORA_RABBIT_PWD=$(head -c 260 /dev/urandom | tr -cd '[:alnum:]' | head -c 26)
+export PANDORA_RABBIT_PWD=$(head -c 18 /dev/urandom | base64)
 rabbitmqctl add_user pandora ${PANDORA_RABBIT_PWD}
 rabbitmqctl add_vhost /pandora
 rabbitmqctl set_permissions -p /pandora pandora ".*" ".*" ".*"