diff --git a/01/koneksi.php b/01/koneksi.php
index b61e5ca..56af4d3 100644
--- a/01/koneksi.php
+++ b/01/koneksi.php
@@ -1,7 +1,7 @@
 <?php
-$host = getenv('DB_HOST') ?: 'localhost';
+$host = getenv('DB_HOST') ?: 'db';
 $user = getenv('DB_USER') ?: 'root';
-$pass = getenv('DB_PASSWORD') ?: '';
+$pass = getenv('DB_PASSWORD') ?: 'rootpassword';
 $db   = getenv('DB_NAME') ?: 'db_spbu';
 
 $conn = @mysqli_connect($host, $user, $pass, $db);
diff --git a/02/db.php b/02/db.php
index 567561e..5404284 100644
--- a/02/db.php
+++ b/02/db.php
@@ -1,8 +1,8 @@
 <?php
 
-$host = getenv('DB_HOST') ?: 'localhost';
+$host = getenv('DB_HOST') ?: 'db';
 $user = getenv('DB_USER') ?: 'root';
-$pass = getenv('DB_PASSWORD') ?: '';
+$pass = getenv('DB_PASSWORD') ?: 'rootpassword';
 $db   = getenv('DB_NAME') ?: '02_kerusakan';
 
 $conn = @mysqli_connect($host, $user, $pass, $db);
diff --git a/04/koneksi.php b/04/koneksi.php
index 1f73155..749f0d6 100644
--- a/04/koneksi.php
+++ b/04/koneksi.php
@@ -1,7 +1,7 @@
 <?php
-$host = getenv('DB_HOST') ?: 'localhost';
+$host = getenv('DB_HOST') ?: 'db';
 $user = getenv('DB_USER') ?: 'root';
-$pass = getenv('DB_PASSWORD') ?: '';
+$pass = getenv('DB_PASSWORD') ?: 'rootpassword';
 $db   = getenv('DB_NAME_04') ?: (getenv('DB_NAME') ?: 'db_24jam');
 
 $conn = @mysqli_connect($host, $user, $pass, $db);
diff --git a/05/koneksi.php b/05/koneksi.php
index 8ad9697..23f91f2 100644
--- a/05/koneksi.php
+++ b/05/koneksi.php
@@ -2,9 +2,9 @@
 // ============================================================
 //  koneksi.php  –  Database uas_06
 // ============================================================
-$host = getenv('DB_HOST') ?: 'localhost';
+$host = getenv('DB_HOST') ?: 'db';
 $user = getenv('DB_USER') ?: 'root';
-$pass = getenv('DB_PASSWORD') ?: '';
+$pass = getenv('DB_PASSWORD') ?: 'rootpassword';
 $db   = getenv('DB_NAME') ?: 'uas_06';
 
 $conn = @mysqli_connect($host, $user, $pass, $db);