diff --git a/docker/8.5/Dockerfile b/docker/8.5/Dockerfile
index f4870f3..e152eeb 100644
--- a/docker/8.5/Dockerfile
+++ b/docker/8.5/Dockerfile
@@ -38,7 +38,7 @@ RUN curl -sS 'https://keyserver.ubuntu.com/pks/lookup?op=get&search=0xb8dc7e5394
        php8.4-memcached php8.4-pcov php8.4-imagick php8.4-xdebug
 
 RUN php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" \
-    && php composer-setup.php --instdir=/usr/local/bin --filename=composer \
+    && php composer-setup.php --install-dir=/usr/local/bin --filename=composer \
     && php -r "unlink('composer-setup.php');"
 
 RUN curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg \