diff --git a/installers/install_ngsa.sh b/installers/install_ngsa.sh
index ed653c7..fb86817 100755
--- a/installers/install_ngsa.sh
+++ b/installers/install_ngsa.sh
@@ -28,7 +28,7 @@
     sudo cp ${OSM_DEVOPS}/installers/helm/values/airflow-values.yaml ${OSM_HELM_WORK_DIR}
     # update airflow-values.yaml to use the right tag
     echo "Updating Helm values file helm/values/airflow-values.yaml to use defaultAirflowTag: ${OSM_DOCKER_TAG}"
-    sudo sed -i "s#defaultAirflowTag:.*#defaultAirflowTag: ${OSM_DOCKER_TAG}#g" ${OSM_HELM_WORK_DIR}/airflow-values.yaml
+    sudo sed -i "s#defaultAirflowTag:.*#defaultAirflowTag: \"${OSM_DOCKER_TAG}\"#g" ${OSM_HELM_WORK_DIR}/airflow-values.yaml
     echo "Updating Helm values file helm/values/airflow-values.yaml to use defaultAirflowRepository: ${DOCKER_REGISTRY_URL}${DOCKER_USER}/airflow"
     sudo sed -i "s#defaultAirflowRepository:.*#defaultAirflowRepository: ${DOCKER_REGISTRY_URL}${DOCKER_USER}/airflow#g" ${OSM_HELM_WORK_DIR}/airflow-values.yaml