diff --git a/.gitignore b/.gitignore
index d88d1f18..e14ff683 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 /.env
 /neodb.env
 /typings
+/upgrade
 
 # Byte-compiled / optimized / DLL files
 __pycache__/
diff --git a/custom/edition.custom.html b/custom/edition.custom.html
index 69ac024b..f288ddc6 100644
--- a/custom/edition.custom.html
+++ b/custom/edition.custom.html
@@ -153,11 +153,11 @@
 		Search by ISBN:<br>
 	    <a target="_blank"
 	       rel="noopener"
-	       href="https://annas-archive.org/search?q={{ item.display_title }}">Anna's Archive</a>
+	       href="https://annas-archive.org/search?q={{ item.isbn }}">Anna's Archive</a>
 	    |
 	    <a target="_blank"
 	       rel="noopener"
-	       href="https://zlib.gs/s/{{ item.display_title }}">Z-Library</a>
+	       href="https://zlib.gs/s/{{ item.isbn }}">Z-Library</a>
 	</div>
 	{% endif %}
 	<div>