diff --git a/src/metadata/MetadataRepositoryImpl.ts b/src/metadata/MetadataRepositoryImpl.ts
index 9f090c95..a9242e07 100644
--- a/src/metadata/MetadataRepositoryImpl.ts
+++ b/src/metadata/MetadataRepositoryImpl.ts
@@ -79,7 +79,7 @@ export class MetadataRepositoryImpl implements MetadataRepository {
 
   protected searchByExtension(parts: string[]): Metadata | undefined {
     const extension = parse(
-      parts[parts.length - 1].replace(METAFILE_SUFFIX, '')
+      parts.at(-1)!.replace(METAFILE_SUFFIX, '')
     ).ext.replace(DOT, '')
 
     if (MetadataRepositoryImpl.UNSAFE_EXTENSION.has(extension)) {
diff --git a/src/service/inResourceHandler.ts b/src/service/inResourceHandler.ts
index 4e6cf04d..45476902 100644
--- a/src/service/inResourceHandler.ts
+++ b/src/service/inResourceHandler.ts
@@ -69,15 +69,15 @@ export default class ResourceHandler extends StandardHandler {
       }
       resourcePath.push(pathElement)
     }
-    const lastPathElement = resourcePath[resourcePath.length - 1]
+    const lastPathElement = resourcePath
+      .at(-1)!
       .replace(METAFILE_SUFFIX, '')
       .split(DOT)
     if (lastPathElement.length > 1) {
       lastPathElement.pop()
     }
 
-    resourcePath[resourcePath.length - 1] = lastPathElement.join(DOT)
-    return `${resourcePath.join(PATH_SEP)}`
+    return `${resourcePath.with(-1, lastPathElement.join(DOT)).join(PATH_SEP)}`
   }
 
   protected override _getMetaTypeFilePath() {
diff --git a/src/service/objectTranslationHandler.ts b/src/service/objectTranslationHandler.ts
index 05e7db8c..783d4f23 100644
--- a/src/service/objectTranslationHandler.ts
+++ b/src/service/objectTranslationHandler.ts
@@ -34,9 +34,9 @@ export default class ObjectTranslationHandler extends ResourceHandler {
   protected _getObjectTranslationPath() {
     // Return Object Translation Path for both objectTranslation and fieldTranslation
     // QUESTION: Why fieldTranslation element are not deployable when objectTranslation element is not in the deployed sources (even if objectTranslation file is empty) ?
-    return `${parse(this.line).dir}${PATH_SEP}${
-      this.splittedLine[this.splittedLine.length - 2]
-    }.${OBJECT_TRANSLATION_META_XML_SUFFIX}`
+    return `${parse(this.line).dir}${PATH_SEP}${this.splittedLine.at(
+      -2
+    )}.${OBJECT_TRANSLATION_META_XML_SUFFIX}`
   }
 
   protected override _delegateFileCopy() {
diff --git a/tsconfig.json b/tsconfig.json
index 38e38901..f3db5dee 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -24,10 +24,11 @@
     "strictNullChecks": true,
     "strictPropertyInitialization": true,
     "useUnknownInCatchVariables": true,
-    "skipLibCheck": true
+    "skipLibCheck": true,
+    "lib": ["ES2023"],
   },
   "include": [
     "./src/**/*",
     "./src/**/*.json"
-  ]
+  ],
 }