diff --git a/Dockerfile b/Dockerfile
index a02b149..48c7a08 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,7 @@ FROM composer:2 AS composer-builder
 WORKDIR /app
 COPY composer.json composer.lock ./
 # Mount auth.json as a secret so it never gets baked into the image
-RUN --mount=type=secret,id=composer_auth,dst=/root/.composer/auth.json \
+RUN --mount=type=secret,id=composer_auth,dst=/composer/auth.json \
     composer install \
     --no-dev \
     --no-interaction \