diff --git a/scripts/_common.sh b/scripts/_common.sh
index 234217a..a76b808 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -75,6 +75,31 @@ ynh_remove_fail2ban_config () {
   sudo systemctl restart fail2ban
 }
 
+ynh_smart_mktemp () {
+        local min_size="${1:-300}"
+        # Transform the minimum size from megabytes to kilobytes
+        min_size=$(( $min_size * 1024 ))
+
+        # Check if there's enough free space in a directory
+        is_there_enough_space () {
+                local free_space=$(df --output=avail "$1" | sed 1d)
+                test $free_space -ge $min_size
+        }
+
+        if is_there_enough_space /tmp; then
+                local tmpdir=/tmp
+        elif is_there_enough_space /var; then
+                local tmpdir=/var
+        elif is_there_enough_space /; then
+                local tmpdir=/   
+        elif is_there_enough_space /home; then
+                local tmpdir=/home
+        else
+		ynh_die "Insufficient free space to continue..."
+        fi
+
+        echo "$(sudo mktemp --directory --tmpdir="$tmpdir")"
+}
 #=================================================
 # FUTURE OFFICIAL HELPERS
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 1c12d3d..bdcf354 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -56,7 +56,7 @@ ynh_abort_if_errors
 #=================================================
 ynh_print_info "Upgrading source files..."
 # Create a temporary directory
-tmpdir="$(mktemp -d)"
+tmpdir="$(ynh_smart_mktemp 6000)"
 # Backup the config file in the temp dir
 cp -a "$final_path/.htconfig.php" "$tmpdir/.htconfig.php"
 cp -a "$final_path/store" "$tmpdir/store"