diff --git a/webapp/Dockerfile.maintenance b/webapp/Dockerfile.maintenance
index 3e4b9b054..bc930f7d0 100644
--- a/webapp/Dockerfile.maintenance
+++ b/webapp/Dockerfile.maintenance
@@ -36,6 +36,6 @@ ONBUILD RUN yarn run generate
 
 FROM build AS production_build
 
-FROM base as production
+FROM base AS production
 COPY --from=production_build ./app/dist/ /usr/share/nginx/html/
 COPY --from=production_build ./app/maintenance/nginx/custom.conf /etc/nginx/conf.d/default.conf