diff --git a/docker-compose.yml b/docker-compose.yml
index b06a3ca..3ac2c80 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -42,7 +42,8 @@ services:
       - ./templates:/app/templates:ro
       - ./static:/app/static:ro
     ports:
-      - "${PORT:-8080}:8080"
+      # This is the crucial fix: both host and container ports are now dynamic
+      - "${PORT:-8080}:${PORT:-8080}"
     networks:
       - blogging-network
     restart: unless-stopped