diff --git a/scripts/_common.sh b/scripts/_common.sh
index 821507e..8ecb9d2 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -7,7 +7,7 @@
 YNH_PHP_VERSION="7.4"
 
 # dependencies used by the app
-pkg_dependencies="php${YNH_PHP_VERSION}-mysql php${YNH_PHP_VERSION}-zip php${YNH_PHP_VERSION}-gd php${YNH_PHP_VERSION}-xml mailutils"
+pkg_dependencies="php${YNH_PHP_VERSION}-mbstring php${YNH_PHP_VERSION}-mysql php${YNH_PHP_VERSION}-zip php${YNH_PHP_VERSION}-gd php${YNH_PHP_VERSION}-xml mailutils"
 
 #=================================================
 # PERSONAL HELPERS