diff --git a/debian/Dockerfile b/debian/Dockerfile
index 9c1f432..a2ee5bd 100644
--- a/debian/Dockerfile
+++ b/debian/Dockerfile
@@ -19,7 +19,7 @@ FROM dunglas/frankenphp:1-php8.3-bookworm
 ARG user=ninja
 
 # PHP modules
-ARG php_require="bcmath gd pdo_mysql zip mbstring"
+ARG php_require="bcmath gd pdo_mysql zip"
 ARG php_suggest="exif imagick intl pcntl soap saxon-12.5.0"
 ARG php_extra="opcache"