diff --git a/src/includes/class.db.postgres.php b/src/includes/class.db.postgres.php
index 3a8e57e..dfc22ae 100644
--- a/src/includes/class.db.postgres.php
+++ b/src/includes/class.db.postgres.php
@@ -15,9 +15,6 @@ class DatabaseResult_Postgres extends DatabaseResult_Abstract
     /** @var int */
     protected $affected;
 
-    /** @var string  const */
-    protected $schema = 'public';
-
     function __construct(PDO $dbh, string $query, bool $resultless = false)
     {
         // use with DELETE, INSERT, UPDATE
@@ -70,6 +67,9 @@ class Database_Postgres extends Database_Abstract
 
     protected $dbname;
 
+    /** @var string  const */
+    protected $schema = 'public';
+
     function __construct()
     {
     }
diff --git a/src/setup.php b/src/setup.php
index 560e0f4..93e0d6c 100644
--- a/src/setup.php
+++ b/src/setup.php
@@ -378,7 +378,7 @@ function createPostgresTables(Database_Abstract $db)
     id INTEGER NOT NULL GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
     name VARCHAR(250) NOT NULL DEFAULT ''
 ) ");
-    $db->ex("CREATE UNIQUE INDEX {$db->prefix}tags_name ON {$db->prefix}tags (name)");
+    $db->ex("CREATE UNIQUE INDEX {$db->prefix}tags_lower_name ON {$db->prefix}tags ((LOWER(name)))");
 
     $db->ex(
 "CREATE TABLE {$db->prefix}tag2task (