diff --git a/README.md b/README.md
index 57560702..b292715e 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ composer require phpoffice/phpspreadsheet
 ```
 
 If you are building your installation on a development machine that is on a different PHP version to the server where it will be deployed, or if your PHP CLI version is not the same as your run-time such as `php-fpm` or Apache's `mod_php`, then you might want to add the following to your `composer.json` before installing:
-```json lines
+```json
 {
     "require": {
         "phpoffice/phpspreadsheet": "^1.23"
diff --git a/docs/index.md b/docs/index.md
index ff137c26..63d71655 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -53,7 +53,7 @@ composer require phpoffice/phpspreadsheet --prefer-source
 ```
 
 If you are building your installation on a development machine that is on a different PHP version to the server where it will be deployed, or if your PHP CLI version is not the same as your run-time such as `php-fpm` or Apache's `mod_php`, then you might want to add the following to your `composer.json` before installing:
-```json lines
+```json
 {
     "require": {
         "phpoffice/phpspreadsheet": "^1.23"