diff --git a/db_ddl.sql b/db_ddl.sql
index a006e79..39c23c8 100644
--- a/db_ddl.sql
+++ b/db_ddl.sql
@@ -4,7 +4,7 @@ CREATE TABLE Documents (
 	Description TEXT,
 	Author TEXT,
 	Published TEXT,
-	URL TEXT NOT NULL
+	URL TEXT
 );
 
 CREATE TABLE DocumentsToTags (
diff --git a/www/_templates/front_doc_overview.php b/www/_templates/front_doc_overview.php
index 4e0b387..b3a8910 100644
--- a/www/_templates/front_doc_overview.php
+++ b/www/_templates/front_doc_overview.php
@@ -22,6 +22,8 @@
     <?php if (!empty($doc["Description"])): ?>
     <p class="doc-description"><span class="doc-description-intro">Description: </span><?= $doc["Description"] ?></p>
     <?php endif; ?>
-    
+
+    <?php if (!empty($doc["URL"])): ?>
     <div class="doc-link"><span class="doc-link-intro">Access file at: </span><a href="<?= $doc["URL"] ?>"><?= urldecode($doc["URL"]) ?></a></div>
+    <?php endif; ?>
 </div>