diff --git a/package-lock.json b/package-lock.json
index 4ceecd392..d2facd6a6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6,7 +6,7 @@
   "packages": {
     "": {
       "name": "@auth0/nextjs-auth0",
-      "version": "1.4.0",
+      "version": "1.4.2",
       "license": "MIT",
       "dependencies": {
         "base64url": "^3.0.1",
diff --git a/src/utils/errors.ts b/src/utils/errors.ts
index ee1353666..3ca7e1c5b 100644
--- a/src/utils/errors.ts
+++ b/src/utils/errors.ts
@@ -9,7 +9,7 @@ export class AccessTokenError extends Error {
   public code: string;
 
   constructor(code: string, message: string) {
-    super(message);
+    super(message) /* istanbul ignore next */;
 
     // Saving class name in the property of our custom error as a shortcut.
     this.name = this.constructor.name;
@@ -49,7 +49,7 @@ export class HandlerError extends Error {
   public code: string | undefined;
 
   constructor(error: Error | AccessTokenError | HttpError) {
-    super(htmlSafe(error.message));
+    super(htmlSafe(error.message)) /* istanbul ignore next */;
 
     this.name = error.name;
 
diff --git a/tsconfig.build.json b/tsconfig.build.json
index 46382618c..41ab4259d 100644
--- a/tsconfig.build.json
+++ b/tsconfig.build.json
@@ -16,7 +16,9 @@
     "noUnusedParameters": true,
     "sourceMap": true,
     "strict": true,
-    "target": "es6",
+    "target": "es5",
+    "lib": ["es6", "dom"],
+    "downlevelIteration": true,
     "resolveJsonModule": true,
     "jsx": "react",
     "outDir": "./dist",