diff --git a/README.md b/README.md
index 294e4cb..3b18a63 100644
--- a/README.md
+++ b/README.md
@@ -92,7 +92,8 @@ Prerequisites: Docker, Kubernetes, and Helm
 2. ```
    docker-compose -f docker-compose.yml -f docker-compose-airflow.yml up -d
    ```
-3. That's it!
+3. Sometimes it can freeze or fail the first time, especially if your machine is not that high in spec (like mine T_T). But you can wait a second, try the last command again and it should start up fine.
+4. That's it!
 
 **Note:** Most of the services' restart is left unspecified, so they won't restart on failures (because sometimes it's quite resource-consuming during development, you see I have a poor laptop lol).
 
diff --git a/docker-compose.yml b/docker-compose.yml
index cd51297..f7df156 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -53,7 +53,7 @@ services:
             - .env
         environment:
             - KAFKA_BOOTSTRAP_SERVER=kafka:9092
-            - DB_CONNECTION_URL=postgresql://spark_user:SuperSecurePwdHere@postgres:{POSTGRES_PORT}/spark_pg_db
+            - DB_CONNECTION_URL=postgresql://spark_user:SuperSecurePwdHere@postgres:${POSTGRES_PORT}/spark_pg_db
         networks:
             - forecast-network
         volumes: