diff --git a/installers/install_ngsa.sh b/installers/install_ngsa.sh
index 5d7ad68..b0c2713 100755
--- a/installers/install_ngsa.sh
+++ b/installers/install_ngsa.sh
@@ -27,7 +27,7 @@
     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" ${OSM_HELM_WORK_DIR}/airflow-values.yaml
     if ! helm -n osm status airflow 2> /dev/null ; then
         # if it does not exist, create secrets and install
         kubectl -n osm create secret generic airflow-webserver-secret --from-literal="webserver-secret-key=$(python3 -c 'import secrets; print(secrets.token_hex(16))')"