diff --git a/.puppet/profiles/icingaweb2_dev/manifests/init.pp b/.puppet/profiles/icingaweb2_dev/manifests/init.pp
index 71e237f39..e06443b33 100644
--- a/.puppet/profiles/icingaweb2_dev/manifests/init.pp
+++ b/.puppet/profiles/icingaweb2_dev/manifests/init.pp
@@ -30,6 +30,7 @@ class icingaweb2_dev (
     'rh-php71-php-pgsql',
     'rh-php71-php-ldap',
     'rh-php71-php-xml',
+    'rh-php71-php-mbstring',
     'sclo-php71-php-pecl-xdebug',
     'sclo-php71-php-pecl-imagick',
     'php-phpunit-PHPUnit'