diff --git a/package-lock.json b/package-lock.json
index c595750..a57a410 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,9 @@
 			"dependencies": {
 				"@aws-sdk/client-sesv2": "^3.734.0",
 				"@sentry/cloudflare": "^8.51.0",
-				"mimetext": "^3.0.27"
+				"mimetext": "^3.0.27",
+				"reflect-metadata": "^0.2.2",
+				"tsyringe-neo": "^5.1.0"
 			},
 			"devDependencies": {
 				"@cloudflare/vitest-pool-workers": "^0.6.4",
@@ -2903,6 +2905,12 @@
 			"dev": true,
 			"license": "Unlicense"
 		},
+		"node_modules/reflect-metadata": {
+			"version": "0.2.2",
+			"resolved": "https://registry.npmjs.org/reflect-metadata/-/reflect-metadata-0.2.2.tgz",
+			"integrity": "sha512-urBwgfrvVP/eAyXx4hluJivBKzuEbSQs9rKWCrCkbSxNv8mxPcUZKeuoF3Uy4mJl3Lwprp6yy5/39VWigZ4K6Q==",
+			"license": "Apache-2.0"
+		},
 		"node_modules/regenerator-runtime": {
 			"version": "0.14.1",
 			"resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.14.1.tgz",
@@ -3145,6 +3153,18 @@
 			"integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
 			"license": "0BSD"
 		},
+		"node_modules/tsyringe-neo": {
+			"version": "5.1.0",
+			"resolved": "https://registry.npmjs.org/tsyringe-neo/-/tsyringe-neo-5.1.0.tgz",
+			"integrity": "sha512-x6QAckY85YLGE980TIR5Xle3s76nhBNYu0kr6UlLAWiPqt4S6PgbbvNV4cjZlItv3ka8adcGYG2Wy/I2yxcqdg==",
+			"license": "MIT",
+			"dependencies": {
+				"tslib": "^2.6.3"
+			},
+			"engines": {
+				"node": ">= 18.0.0"
+			}
+		},
 		"node_modules/typescript": {
 			"version": "5.7.3",
 			"resolved": "https://registry.npmjs.org/typescript/-/typescript-5.7.3.tgz",
diff --git a/package.json b/package.json
index b04b427..d0ce055 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,8 @@
 	"dependencies": {
 		"@aws-sdk/client-sesv2": "^3.734.0",
 		"@sentry/cloudflare": "^8.51.0",
-		"mimetext": "^3.0.27"
+		"mimetext": "^3.0.27",
+		"reflect-metadata": "^0.2.2",
+		"tsyringe-neo": "^5.1.0"
 	}
 }
diff --git a/src/app/config.ts b/src/app/config.ts
new file mode 100644
index 0000000..326fbf4
--- /dev/null
+++ b/src/app/config.ts
@@ -0,0 +1,6 @@
+export class Config {
+	constructor(
+		public readonly awsAccessKeyId: string,
+		public readonly awsSecretAccessKey: string,
+	) {}
+}
diff --git a/src/app/container.ts b/src/app/container.ts
new file mode 100644
index 0000000..382822e
--- /dev/null
+++ b/src/app/container.ts
@@ -0,0 +1,32 @@
+import { SESv2Client } from "@aws-sdk/client-sesv2";
+import {
+	container,
+	DependencyContainer,
+	instanceCachingFactory,
+} from "tsyringe-neo";
+
+import { Config } from "./config";
+
+container.register(SESv2Client, {
+	useFactory: instanceCachingFactory((c) => {
+		const config = c.resolve<Config>(Config);
+
+		return new SESv2Client({
+			region: "ap-northeast-1",
+			credentials: {
+				accessKeyId: config.awsAccessKeyId,
+				secretAccessKey: config.awsSecretAccessKey,
+			},
+		});
+	}),
+});
+
+export function getContainer(env: Env): DependencyContainer {
+	const c = container.createChildContainer();
+
+	c.register(Config, {
+		useValue: new Config(env.AWS_ACCESS_KEY_ID, env.AWS_SECRET_ACCESS_KEY),
+	});
+
+	return c;
+}
diff --git a/src/index.ts b/src/index.ts
index 7d84965..357848a 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,5 @@
+import "reflect-metadata";
+
 import { withSentry } from "./vendor/sentry";
 
 export default withSentry(
diff --git a/worker-configuration.d.ts b/worker-configuration.d.ts
index 231266c..e731647 100644
--- a/worker-configuration.d.ts
+++ b/worker-configuration.d.ts
@@ -1,6 +1,10 @@
-// Generated by Wrangler
-// After adding bindings to `wrangler.json`, regenerate this interface via `npm run cf-typegen`
+// Generated by Wrangler by running `wrangler types`
+
 interface Env {
-	OPENAI_GATEWAY: string;
+	STORE: KVNamespace;
 	SENTRY_DSN: string;
+	AWS_ACCESS_KEY_ID: string;
+	AWS_SECRET_ACCESS_KEY: string;
+	OPENAI_API_KEY: string;
+	CF_VERSION_METADATA: { id: string; tag: string };
 }