diff --git a/composer.Dockerfile b/composer.Dockerfile
index 1026ff0..658d9a5 100644
--- a/composer.Dockerfile
+++ b/composer.Dockerfile
@@ -2,7 +2,7 @@ ARG PHP_VERSION=8.4
 
 FROM ghcr.io/ghostwriter/php:${PHP_VERSION}-cli
 
-ENV COMPOSER_ALLOW_SUPERUSER 1
+ENV COMPOSER_ALLOW_SUPERUSER=1
 
 COPY --from=composer /usr/bin/composer /usr/local/bin/composer