diff --git a/tsconfig.json b/tsconfig.json
index cf86e65..45f961c 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -11,8 +11,10 @@
     // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
 
     /* Language and Environment */
-    "target": "ES2017",                                  /* Set the JavaScript language version for emitted JavaScript and  compatible library declarations. */
-    // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
+    "target": "ES2017" /* Set the JavaScript language version for emitted JavaScript and  compatible library declarations. */,
+    "lib": [
+      "ES2021.String"
+    ] /* Specify a set of bundled library declaration files that describe the target runtime environment. */,
     // "jsx": "preserve",                                /* Specify what JSX code is generated. */
     // "experimentalDecorators": true,                   /* Enable experimental support for legacy experimental decorators. */
     // "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */
@@ -25,9 +27,9 @@
     // "moduleDetection": "auto",                        /* Control what method is used to detect module-format JS files. */
 
     /* Modules */
-    "module": "commonjs",                                /* Specify what module code is generated. */
-    "rootDir": "./src",                                  /* Specify the root folder within your source files. */
-    "moduleResolution": "node",                     /* Specify how TypeScript looks up a file from a given module specifier. */
+    "module": "commonjs" /* Specify what module code is generated. */,
+    "rootDir": "./src" /* Specify the root folder within your source files. */,
+    "moduleResolution": "node" /* Specify how TypeScript looks up a file from a given module specifier. */,
     // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
     // "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
     // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
@@ -58,7 +60,7 @@
     // "inlineSourceMap": true,                          /*  sourcemap files inside the emitted JavaScript. */
     // "noEmit": true,                                   /* Disable emitting files from a compilation. */
     // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */
-    "outDir": "./dist",                                   /* Specify an output folder for all emitted files. */
+    "outDir": "./dist" /* Specify an output folder for all emitted files. */,
     // "removeComments": true,                           /* Disable emitting comments. */
     // "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
     // "downlevelIteration": true,                       /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
@@ -78,9 +80,9 @@
     // "verbatimModuleSyntax": true,                     /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */
     // "isolatedDeclarations": true,                     /* Require sufficient annotation on exports so other tools can trivially generate declaration files. */
     // "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
-    "esModuleInterop": true,                             /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
+    "esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */,
     // "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
-    "forceConsistentCasingInFileNames": true,            /* Ensure that casing is correct in imports. */
+    "forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,
 
     /* Type Checking */
     // "strict": true,                                      /* Enable all strict type-checking options. */
@@ -106,7 +108,7 @@
 
     /* Completeness */
     // "skipDefaultLibCheck": true,                      /* Skip type checking .d.ts files that are d with TypeScript. */
-    "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */
+    "skipLibCheck": true /* Skip type checking all .d.ts files. */
   },
   "include": ["src/**/*"],
   "exclude": ["node_modules"]