diff --git a/index.ts b/index.ts
index 330e5d3..9193ceb 100644
--- a/index.ts
+++ b/index.ts
@@ -1,7 +1,7 @@
 // from: https://github.com/pinax-network/substreams-clock-api/blob/main/index.ts
-import { config } from "./src/config";
-import { logger } from "./src/logger";
-import GET from "./src/fetch/GET";
+import { config } from "./src/config.js";
+import { logger } from "./src/logger.js";
+import GET from "./src/fetch/GET.js";
 import * as prometheus from "./src/prometheus.js";
 
 if (config.verbose) logger.enable();
diff --git a/src/clickhouse/createClient.ts b/src/clickhouse/createClient.ts
index cd732b5..cc53f83 100644
--- a/src/clickhouse/createClient.ts
+++ b/src/clickhouse/createClient.ts
@@ -1,7 +1,7 @@
 // from: https://github.com/pinax-network/substreams-clock-api/blob/main/src/clickhouse/createClient.ts
 import { createClient } from "@clickhouse/client-web";
-import { ping } from "./ping";
-import { APP_NAME, config } from "../config";
+import { ping } from "./ping.js";
+import { APP_NAME, config } from "../config.js";
 
 const client = createClient({
     ...config,
diff --git a/src/clickhouse/makeQuery.ts b/src/clickhouse/makeQuery.ts
index 5cf7018..87fc221 100644
--- a/src/clickhouse/makeQuery.ts
+++ b/src/clickhouse/makeQuery.ts
@@ -1,7 +1,7 @@
 // from: https://github.com/pinax-network/substreams-clock-api/blob/main/src/clickhouse/makeQuery.ts
-import { logger } from "../logger";
-import * as prometheus from "../prometheus";
-import client from "./createClient";
+import { logger } from "../logger.js";
+import * as prometheus from "../prometheus.js";
+import client from "./createClient.js";
 
 export interface Meta {
     name: string,
diff --git a/src/clickhouse/ping.ts b/src/clickhouse/ping.ts
index 1d69880..afdb5d9 100644
--- a/src/clickhouse/ping.ts
+++ b/src/clickhouse/ping.ts
@@ -1,6 +1,6 @@
 // from: https://github.com/pinax-network/substreams-clock-api/blob/main/src/clickhouse/ping.ts
 import { PingResult } from "@clickhouse/client-web";
-import client from "./createClient";
+import client from "./createClient.js";
 
 // Does not work with Bun's implementation of Node streams.
 export async function ping(): Promise<PingResult> {
diff --git a/src/fetch/openapi.ts b/src/fetch/openapi.ts
index bf96b22..1539942 100644
--- a/src/fetch/openapi.ts
+++ b/src/fetch/openapi.ts
@@ -2,10 +2,10 @@
 import pkg from "../../package.json" assert { type: "json" };
 
 import { OpenApiBuilder, SchemaObject, ExampleObject, ParameterObject } from "openapi3-ts/oas31";
-import { config } from "../config";
-import { getBalanceChanges, getContracts, getTotalSupply } from "../queries";
-import { registry } from "../prometheus";
-import { makeQuery } from "../clickhouse/makeQuery";
+import { config } from "../config.js";
+import { getBalanceChanges, getContracts, getTotalSupply } from "../queries.js";
+import { registry } from "../prometheus.js";
+import { makeQuery } from "../clickhouse/makeQuery.js";
 import { supportedChainsQuery } from "./chains.js";
 
 const TAGS = {
diff --git a/src/queries.spec.ts b/src/queries.spec.ts
index cb71a3a..eb51556 100644
--- a/src/queries.spec.ts
+++ b/src/queries.spec.ts
@@ -1,7 +1,7 @@
 // from: https://github.com/pinax-network/substreams-clock-api/blob/main/src/queries.spec.ts
 
 import { expect, test } from "bun:test";
-import { getContracts, getChain, getTotalSupply, getBalanceChanges } from "./queries";
+import { getContracts, getChain, getTotalSupply, getBalanceChanges } from "./queries.js";
 
 const chain = "eth";
 const address = 'dac17f958d2ee523a2206206994597c13d831ec7'
diff --git a/src/queries.ts b/src/queries.ts
index 8282b37..a053bcc 100644
--- a/src/queries.ts
+++ b/src/queries.ts
@@ -1,5 +1,5 @@
-import { DEFAULT_SORT_BY } from "./config";
-import { getAddress, parseLimit } from "./utils";
+import { DEFAULT_SORT_BY } from "./config.js";
+import { getAddress, parseLimit } from "./utils.js";
 
 export function getTotalSupply(searchParams: URLSearchParams) {
     // Params
diff --git a/src/types.ts b/src/types.d.ts
similarity index 100%
rename from src/types.ts
rename to src/types.d.ts
diff --git a/src/utils.spec.ts b/src/utils.spec.ts
index 86726c8..a839002 100644
--- a/src/utils.spec.ts
+++ b/src/utils.spec.ts
@@ -1,5 +1,5 @@
 import { expect, test } from "bun:test";
-import { formatAddress, checkValidAddress, getAddress } from "./utils";
+import { formatAddress, checkValidAddress, getAddress } from "./utils.js";
 
 const address = "0xdac17f958d2ee523a2206206994597c13d831ec7";
 
diff --git a/src/utils.ts b/src/utils.ts
index 44407c9..8f30472 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,5 +1,5 @@
 import { ethers } from "ethers";
-import { config } from "./config";
+import { config } from "./config.js";
 
 export function getAddress(searchParams: URLSearchParams, key: string, required: boolean = false) {
     const address = formatAddress(searchParams.get(key));
diff --git a/tsconfig.json b/tsconfig.json
index b2d001e..8f96e58 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,38 +1,18 @@
 {
   "compilerOptions": {
-    // add Bun type definitions
-    "types": ["bun-types"],
-
-    // enable latest features
-    "lib": ["ESNext"],
-    "module": "esnext",
-    "target": "esnext",
-
-    // if TS 5.x+
-    "moduleResolution": "bundler",
-    "noEmit": true,
-    "allowImportingTsExtensions": true,
-    "moduleDetection": "force",
-    // if TS 4.x or earlier
-    // "moduleResolution": "nodenext",
-
-    "jsx": "react-jsx", // support JSX
-    "allowJs": true, // allow importing `.js` from `.ts`
-
-    // best practices
+    "target": "ESNext",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "resolveJsonModule": true,
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "outDir": "./dist/",
     "strict": true,
-    "forceConsistentCasingInFileNames": true,
+    "noImplicitAny": true,
+    "strictNullChecks": true,
+    "alwaysStrict": true,
     "skipLibCheck": true,
-    "composite": true,
-    "downlevelIteration": true,
-    "allowSyntheticDefaultImports": true
-  },
-  "include": [
-    "src/**/*.ts",
-    "package.json"
-  ],
-  "exclude": [
-    "node_modules",
-    "src/tests/*.spec.ts"
-  ]
+    "types": ["bun-types"]
+  }
 }
\ No newline at end of file