diff --git a/installers/common.sh b/installers/common.sh
index 2d05213d..72c66dc1 100755
--- a/installers/common.sh
+++ b/installers/common.sh
@@ -250,7 +250,7 @@ function _install_dependencies() {
     # Set dconf-set-selections
     echo iptables-persistent iptables-persistent/autosave_v4 boolean true | sudo debconf-set-selections
     echo iptables-persistent iptables-persistent/autosave_v6 boolean true | sudo debconf-set-selections
-    sudo apt-get install -y lighttpd git hostapd dnsmasq iptables-persistent $php_package $dhcpcd_package $iw_package $rsync_package $network_tools vnstat qrencode jq isoquery || _install_status 1 "Unable to install dependencies"
+    sudo apt-get install -y lighttpd git hostapd dnsmasq iptables-persistent $php_package $dhcpcd_package $iw_package $rsync_package $network_tools vnstat qrencode jq isoquery php-mbstring || _install_status 1 "Unable to install dependencies"
     _install_status 0
 }