diff --git a/debian/resources/php.sh b/debian/resources/php.sh
index f3f663c..d487bfd 100755
--- a/debian/resources/php.sh
+++ b/debian/resources/php.sh
@@ -46,7 +46,8 @@ else
 		sh -c 'echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list'
 	fi
 	if [ ."$os_codename" = ."buster" ]; then
-		php_version=7.3
+		wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
+		sh -c 'echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list'
 	fi
 	if [ ."$os_codename" = ."bullseye" ]; then
 		wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg