diff --git a/app/Dockerfile b/app/Dockerfile
index 3442f22..ce54c6b 100644
--- a/app/Dockerfile
+++ b/app/Dockerfile
@@ -4,7 +4,7 @@ EXPOSE 9000/tcp
 ENV SCRIPT_ROOT=/opt/tt-rss
 
 RUN apk add --no-cache dcron php81 php81-fpm php81-phar \
-	php81-pdo php81-gd php81-pgsql php81-pdo_pgsql \
+	php81-pdo php81-gd php81-pgsql php81-pdo_pgsql php81-xmlwriter \
 	php81-mbstring php81-intl php81-xml php81-curl php81-simplexml \
 	php81-session php81-tokenizer php81-dom php81-fileinfo php81-ctype \
 	php81-json php81-iconv php81-pcntl php81-posix php81-zip php81-exif \