diff --git a/scripts/create-archives.sh b/scripts/create-archives.sh
index 315c1b9..3035ec8 100755
--- a/scripts/create-archives.sh
+++ b/scripts/create-archives.sh
@@ -19,6 +19,11 @@ do
         echo "Creating archive for $dir"
         cd "$dir"
 
-        # find -type f -iname "*.jpg" | grep -v '/thumbnail.jpg$' | zip -u album.zip -@
+        update=
+        if [ -f album.zip ]
+        then
+            update=-u
+        fi
+        find -type f -iname "*.jpg" | grep -v '/thumbnail.jpg$' | zip $update album.zip -@
     )
 done