diff --git a/docker-compose.yml.example b/docker-compose.yml.example
index 59b9518..dabdbad 100755
--- a/docker-compose.yml.example
+++ b/docker-compose.yml.example
@@ -65,6 +65,7 @@ services:
         - PUID=${WORKSPACE_PUID}
         - PGID=${WORKSPACE_PGID}
         - TZ=${WORKSPACE_TIMEZONE}
+        - COMPOSER_VERSION=${WORKSPACE_COMPOSER_VERSION}
         - COMPOSER_GLOBAL_INSTALL=${WORKSPACE_COMPOSER_GLOBAL_INSTALL}
         - COMPOSER_AUTH=${WORKSPACE_COMPOSER_AUTH}
         - COMPOSER_REPO_PACKAGIST=${WORKSPACE_COMPOSER_REPO_PACKAGIST}