diff --git a/scripts/upgrade b/scripts/upgrade
index 5ba8ef7..99cb233 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -104,11 +104,12 @@ current_major_version=${current_version%%.*}
 
 # Define a function to execute commands with `occ`
 exec_occ() {
+    local pkg_dependencies = ""
     # Backward compatibility to upgrade from older versions
     if [ $current_major_version = "last" ] || [ $current_major_version -ge 26 ]
     then
         NEXTCLOUD_PHP_VERSION=$phpversion
-    elif [ $current_major_version -ge 25 ]
+    elif [ $current_major_version -ge 24 ]
     then
         NEXTCLOUD_PHP_VERSION="8.1"
     elif [ $current_major_version -ge 18 ]
@@ -117,6 +118,11 @@ exec_occ() {
     else
         NEXTCLOUD_PHP_VERSION="7.1"
     fi
+    if ! php$NEXTCLOUD_PHP_VERSION 2>/dev/null; then
+        local pkg_dependencies = ${dpkg-query --show --showformat='${Depends}' ${app}-ynh-deps}
+        pkg_dependencies=${pkg_dependencies/$phpversion/$NEXTCLOUD_PHP_VERSION}
+        ynh_install_app_dependencies $pkg_dependencies
+    if 
 (cd "$install_dir" && ynh_exec_as "$app" \
     php$NEXTCLOUD_PHP_VERSION --define apc.enable_cli=1 occ --no-interaction --no-ansi "$@")
 }