diff --git a/rootfs/usr/local/bin/container-setup b/rootfs/usr/local/bin/container-setup
index 1ad6846..46a3b33 100755
--- a/rootfs/usr/local/bin/container-setup
+++ b/rootfs/usr/local/bin/container-setup
@@ -5,6 +5,7 @@ url="https://github.com/WordPress/WordPress/archive/${WP_VERSION}.tar.gz"
 packages=(
 	php7-curl
 	php7-gd
+	php7-json
 	php7-mysqli
 	php7-opcache
 	php7-zip