diff --git a/Dockerfile b/Dockerfile
index 9791828..d0ba5ec 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.12
+FROM alpine:3.15
 
 LABEL maintainer "Marvin Steadfast <marvin@xsteadfastx.org>"
 
@@ -58,7 +58,7 @@ RUN set -ex \
  && ln -sf /dev/stderr /var/log/nginx/error.log \
  && curl -s https://getcomposer.org/installer | php \
  && mv composer.phar /usr/local/bin/composer \
- && composer selfupdate 2.2.10 \
+ && composer selfupdate 2.2.12 \
  && git clone --branch $WALLABAG_VERSION --depth 1 https://github.com/wallabag/wallabag.git /var/www/wallabag
 
 COPY root /