diff --git a/docker/docker-compose.override.yml.default b/docker/docker-compose.override.yml.default
index fc235cb6b..241ed1e71 100644
--- a/docker/docker-compose.override.yml.default
+++ b/docker/docker-compose.override.yml.default
@@ -20,6 +20,7 @@ services:
   php:
     environment:
       COMPOSER_MEMORY_LIMIT: "-1"
+      COMPOSER_CACHE_DIR: /var/www/html/.cache/composer/cache
 #      BLACKFIRE_CLIENT_ID: x
 #      BLACKFIRE_CLIENT_TOKEN: x
 #      NEW_RELIC_APPNAME: "${COMPOSE_PROJECT_NAME}"