diff --git a/app/config/collections2.php b/app/config/collections2.php
index 71dc7e9f69..72b8e00671 100644
--- a/app/config/collections2.php
+++ b/app/config/collections2.php
@@ -578,7 +578,7 @@ $collections = [
                 '$id' => 'email',
                 'type' => Database::VAR_STRING,
                 'format' => '',
-                'size' => 1024,
+                'size' => 320,
                 'signed' => true,
                 'required' => false,
                 'default' => null,
@@ -712,14 +712,14 @@ $collections = [
                 '$id' => '_key_email',
                 'type' => Database::INDEX_UNIQUE,
                 'attributes' => ['email'],
-                'lengths' => [1024],
+                'lengths' => [320],
                 'orders' => [Database::ORDER_ASC],
             ],
             [
                 '$id' => '_key_deleted_email',
                 'type' => Database::INDEX_KEY,
                 'attributes' => ['deleted', 'email'],
-                'lengths' => [0, 1024],
+                'lengths' => [0, 320],
                 'orders' => [Database::ORDER_ASC, Database::ORDER_ASC],
             ],
         ],