diff --git a/config_sample.yaml b/config_sample.yaml
index 65ca1bc..c78fec3 100644
--- a/config_sample.yaml
+++ b/config_sample.yaml
@@ -1,5 +1,13 @@
-db_user: "DATABASE_USERNAME"
-db_password: "DATABASE_PASSWORD"
-db_host: "DATABASE_HOST"
-db_name: "DATABASE_NAME"
-db_port: 5432
+db:
+  user: "DATABASE_USERNAME"
+  password: "DATABASE_PASSWORD"
+  host: "DATABASE_HOST"
+  name: "DATABASE_NAME"
+  port: 5432
+currency:
+  - USD
+  - RUB
+  - EUR
+  - UAH
+  - TRY
+  - KZT
\ No newline at end of file
diff --git a/postgresql.js b/postgresql.js
index ee3924f..4c80eb0 100644
--- a/postgresql.js
+++ b/postgresql.js
@@ -4,11 +4,11 @@ const fs = require("fs");
 const config = yaml.parse(fs.readFileSync("./config.yaml", "utf-8"));
 
 const pool = new pg.Pool({
-    user:  config['db_user'],
-    password: config['db_password'],
-    host: config['db_host'],
-    port: config['db_port'],
-    database: config['db_name']
+    user:  config['db']['user'],
+    password: config['db']['password'],
+    host: config['db']['host'],
+    port: config['db']['port'],
+    database: config['db']['name']
 });
 
 module.exports = pool;