diff --git a/projects/configuration-options/secret-messages/01-encoded-outputs/index.ts b/projects/configuration-options/secret-messages/01-encoded-outputs/index.ts
index 5e31b6f2..5ffe2c80 100644
--- a/projects/configuration-options/secret-messages/01-encoded-outputs/index.ts
+++ b/projects/configuration-options/secret-messages/01-encoded-outputs/index.ts
@@ -4,7 +4,7 @@ export function encodeMessage(message: string) {
 	let output = "";
 
 	for (let i = 0; i < message.length; i += 1) {
-		output += String.fromCharCode(message.codePointAt(i)! + i + message.length);
+		output += String.fromCharCode(message.charCodeAt(i) + i + message.length);
 	}
 
 	return output;
diff --git a/projects/configuration-options/secret-messages/02-allowed-imports/index.ts b/projects/configuration-options/secret-messages/02-allowed-imports/index.ts
index 134cd677..9d8d210c 100644
--- a/projects/configuration-options/secret-messages/02-allowed-imports/index.ts
+++ b/projects/configuration-options/secret-messages/02-allowed-imports/index.ts
@@ -5,7 +5,7 @@ export function decodeMessage(message: string) {
 	let output = "";
 
 	for (let i = 0; i < message.length; i += 1) {
-		output += String.fromCharCode(message.codePointAt(i) - i - message.length);
+		output += String.fromCharCode(message.charCodeAt(i) - i - message.length);
 	}
 
 	return output;
diff --git a/projects/configuration-options/secret-messages/tsconfig.json b/projects/configuration-options/secret-messages/tsconfig.json
index 3fcafa94..8ee4191e 100644
--- a/projects/configuration-options/secret-messages/tsconfig.json
+++ b/projects/configuration-options/secret-messages/tsconfig.json
@@ -1,4 +1,9 @@
 {
+	"compilerOptions": {
+		"allowJs": true,
+		"noEmit": true,
+		"resolveJsonModule": true
+	},
 	"extends": "../../../tsconfig.json",
 	"include": ["."]
 }