diff --git a/packages/range-utils/src/provideInclusiveOptions.js b/packages/range-utils/src/provideInclusiveOptions.ts
similarity index 77%
rename from packages/range-utils/src/provideInclusiveOptions.js
rename to packages/range-utils/src/provideInclusiveOptions.ts
index 5eaa974f..2e82cd02 100644
--- a/packages/range-utils/src/provideInclusiveOptions.js
+++ b/packages/range-utils/src/provideInclusiveOptions.ts
@@ -1,14 +1,16 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
 import { assign } from "lodash";
 
-export default function provideInclusiveOptions(funToWrap) {
-  return function () {
-    const args = Array.prototype.slice.call(arguments);
+export default function provideInclusiveOptions(
+  funToWrap: (...args: any[]) => any
+): (...args: any[]) => any {
+  return function (...args: any[]): any {
     const options = args[args.length - 1];
     if (
       options &&
       (options.inclusive1BasedEnd || options.inclusive1BasedStart)
     ) {
-      args.forEach(function (arg, index) {
+      args.forEach(function (arg: any, index: number) {
         if (arg && arg.start > -1 && options.inclusive1BasedStart) {
           args[index] = assign(arg, { start: arg.start - 1 });
         }
diff --git a/tsconfig.base.json b/tsconfig.base.json
index a8394aec..52e5a02b 100644
--- a/tsconfig.base.json
+++ b/tsconfig.base.json
@@ -2,7 +2,7 @@
   "compileOnSave": false,
   "compilerOptions": {
     "rootDir": ".",
-    "sourceMap": true,
+    // "sourceMap": true,
     "moduleResolution": "node",
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,