diff --git a/package.json b/package.json
index 0d8d654a..6401d240 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "lint": "eslint . --ext .js,.ts",
     "timeseries": "node --loader ts-node/esm scripts/timeseries.js",
     "build": "yarn run build:esm && yarn run build:cjs",
-    "build:esm": "tsc --module es2020 --target es2019 --outDir dist/esm",
+    "build:esm": "tsc --module esnext --target es2019 --outDir dist/esm",
     "build:cjs": "tsc --module commonjs --target es2015 --outDir dist/cjs && sed 's/\"type\": \"module\",/\"type:\": \"commonjs\",/' dist/cjs/package.json > dist/cjs/package-changed.json && mv dist/cjs/package-changed.json dist/cjs/package.json",
     "prepublishOnly": "yarn build",
     "test": "node --experimental-vm-modules ./node_modules/jest/bin/jest.js",
diff --git a/src/lib/getCrumb.ts b/src/lib/getCrumb.ts
index 2ad3fbae..28ef57ea 100644
--- a/src/lib/getCrumb.ts
+++ b/src/lib/getCrumb.ts
@@ -1,6 +1,8 @@
 import type { RequestInfo, RequestInit, Response } from "node-fetch";
 import type { ExtendedCookieJar } from "./cookieJar";
-import pkg from "../../package.json";
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-ignore: we have to ignore this for csm output.
+import pkg from "../../package.json" assert { type: "json" };
 import { Logger } from "./options.js";
 import { Cookie } from "tough-cookie";
 import { showNotice } from "./notices.js";
diff --git a/src/lib/validateAndCoerceTypes.ts b/src/lib/validateAndCoerceTypes.ts
index 60060e12..c960d1ea 100644
--- a/src/lib/validateAndCoerceTypes.ts
+++ b/src/lib/validateAndCoerceTypes.ts
@@ -1,4 +1,6 @@
-import pkg from "../../package.json";
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-ignore: we have to ignore this for csm output.
+import pkg from "../../package.json" assert { type: "json" };
 import { FailedYahooValidationError, InvalidOptionsError } from "./errors.js";
 import { StaticDecode, type TSchema } from "@sinclair/typebox";
 import {
diff --git a/src/lib/yahooFinanceFetch.ts b/src/lib/yahooFinanceFetch.ts
index 8344ed44..10020a75 100644
--- a/src/lib/yahooFinanceFetch.ts
+++ b/src/lib/yahooFinanceFetch.ts
@@ -5,7 +5,9 @@ import type { YahooFinanceOptions } from "./options.js";
 import type { QueueOptions } from "./queue.js";
 
 import errors from "./errors.js";
-import pkg from "../../package.json";
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-ignore: we have to ignore this for csm output.assert
+import pkg from "../../package.json" assert { type: "json" };
 import getCrumb from "./getCrumb.js";
 
 const userAgent = `${pkg.name}/${pkg.version} (+${pkg.repository})`;
diff --git a/src/modules/fundamentalsTimeSeries.ts b/src/modules/fundamentalsTimeSeries.ts
index 5b920c99..f90b7390 100644
--- a/src/modules/fundamentalsTimeSeries.ts
+++ b/src/modules/fundamentalsTimeSeries.ts
@@ -5,7 +5,9 @@ import type {
   ModuleOptionsWithValidateFalse,
   ModuleThis,
 } from "../lib/moduleCommon.js";
-import Timeseries_Keys from "../lib/timeseries.json";
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-ignore: we have to ignore this for csm output.
+import Timeseries_Keys from "../lib/timeseries.json" assert { type: "json" };
 import { YahooFinanceDate, YahooNumber } from "../lib/yahooFinanceTypes.js";
 
 const FundamentalsTimeSeries_Types = ["quarterly", "annual", "trailing"];
diff --git a/tsconfig.json b/tsconfig.json
index 9301e22b..b42a3043 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,7 +3,7 @@
 
   "compilerOptions": {
     "moduleResolution": "node",
-    "module": "es2020",
+    "module": "esnext",
     "target": "es2020",
     "outDir": "dist/default",
     "allowJs": true,