diff --git a/.docker/app/Dockerfile b/.docker/app/Dockerfile
index 8677fe080..e1a70d011 100644
--- a/.docker/app/Dockerfile
+++ b/.docker/app/Dockerfile
@@ -4,8 +4,8 @@ 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 php81-sockets \
-	php81-pdo php81-gd php81-pgsql php81-pdo_pgsql php81-xmlwriter \
+RUN apk add --no-cache dcron php81 php81-fpm php81-phar php81-sockets php81-pecl-apcu \
+	php81-pdo php81-gd php81-pgsql php81-pdo_pgsql php81-xmlwriter php81-opcache \
 	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 \