diff --git a/Dockerfile b/Dockerfile
index 3c64162..643ca74 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -74,4 +74,7 @@ RUN chmod +x /usr/local/bin/start.sh
 
 WORKDIR /var/www/html
 
+# Traefik picks the backend port from EXPOSE (php:7.4-apache declared it)
+EXPOSE 80
+
 ENTRYPOINT ["/usr/local/bin/start.sh"]