diff --git a/.docker/app/Dockerfile b/.docker/app/Dockerfile
index fbc904f5ebc2e1915d5c0d4f9696ead7a80f2a3b..63f43dc600b6d03a87049256e7da7828f8838593 100644
--- a/.docker/app/Dockerfile
+++ b/.docker/app/Dockerfile
@@ -4,7 +4,7 @@ EXPOSE 9000/tcp
 ENV SCRIPT_ROOT=/opt/tt-rss
 ENV SRC_DIR=/src/tt-rss/
 
-RUN apk add --no-cache dcron php81 php81-fpm php81-phar \
+RUN apk add --no-cache dcron php81 php81-fpm php81-phar php81-sockets \
 	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 \