diff --git a/boot.sh b/boot.sh
index a0a1b058..985f5bd7 100644
--- a/boot.sh
+++ b/boot.sh
@@ -34,7 +34,7 @@ if [ "${DB_ENGINE}" != 'django.db.backends.sqlite3' ]; then
       display_warning "The environment variable 'POSTGRES_PASSWORD' is not set but REQUIRED for running Tandoor!"
   fi
 
-  while pg_isready --host=${POSTGRES_HOST} -q; status=$?; attempt=$((attempt+1)); [ $status -ne 0 ] && [ $attempt -le $max_attempts ]; do
+  while pg_isready --host=${POSTGRES_HOST} --port=${POSTGRES_PORT} -q; status=$?; attempt=$((attempt+1)); [ $status -ne 0 ] && [ $attempt -le $max_attempts ]; do
       sleep 5
   done
 fi
@@ -63,4 +63,4 @@ echo "Done"
 
 chmod -R 755 /opt/recipes/mediafiles
 
-exec gunicorn -b :$TANDOOR_PORT --access-logfile - --error-logfile - --log-level INFO recipes.wsgi
\ No newline at end of file
+exec gunicorn -b :$TANDOOR_PORT --access-logfile - --error-logfile - --log-level INFO recipes.wsgi