diff --git a/config.yml b/config.yml
index 3e9088a..b8efbf9 100644
--- a/config.yml
+++ b/config.yml
@@ -8,7 +8,7 @@ endpoints:
         - key: "Content-Type"
           value: "application/json"
         - key: "Authorization"
-          value: "Bearer 1234567890"
+          value: "Bearer ${AUTH_TOKEN}"
   - name: "todos-post"
     path: "/todos"
     method: "POST"
@@ -18,7 +18,7 @@ endpoints:
         - key: "Content-Type"
           value: "application/json"
         - key: "Authorization"
-          value: "Bearer 1234567890"
+          value: "Bearer ${AUTH_TOKEN}"
   - name: "posts"
     path: "/posts"
     method: "GET"
diff --git a/src/index.ts b/src/index.ts
index f3d2eca..9f0b110 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,11 +1,15 @@
+import "dotenv/config";
 import express from "express";
+import { parseConfig } from "./utils/config/parse-config";
 
 const app = express();
 
 const PORT = process.env.PORT || 6060;
 
 app.get("/", (req, res) => {
-  res.send("Hello World");
+  const config = parseConfig("config.yml");
+
+  res.send(config);
 });
 
 app.listen(PORT, () => {
diff --git a/src/utils/config/parse-config.ts b/src/utils/config/parse-config.ts
index e10550c..9a92439 100644
--- a/src/utils/config/parse-config.ts
+++ b/src/utils/config/parse-config.ts
@@ -4,8 +4,11 @@ import { Config } from "../../types/config";
 import { validateConfig } from "./validate-config";
 
 export const parseConfig = (filePath: string): Config => {
-  const file = fs.readFileSync(filePath, "utf8");
-  const config = YAML.parse(file);
+  const fileContents = fs
+    .readFileSync(filePath, "utf8")
+    .replace(/\$\{(.+?)\}/g, (match, name) => process.env[name] || match);
+
+  const config = YAML.parse(fileContents);
 
   const valid = validateConfig(config);