diff --git a/docker/php/Dockerfile b/docker/php/Dockerfile
index a0caaa3..1b277f1 100644
--- a/docker/php/Dockerfile
+++ b/docker/php/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.3-bullseye
+FROM php:8.4-bullseye
 SHELL ["/bin/bash", "-oeux", "pipefail", "-c"]
 
 # timezone environment
@@ -11,7 +11,7 @@ ENV TZ=UTC \
   COMPOSER_ALLOW_SUPERUSER=1 \
   COMPOSER_HOME=/composer
 
-COPY --from=composer:2.6 /usr/bin/composer /usr/bin/composer
+COPY --from=composer:2.8 /usr/bin/composer /usr/bin/composer
 
 RUN apt-get update && \
   apt-get -y install git libicu-dev libonig-dev libzip-dev unzip locales && \