diff --git a/migrations/2023_09_29_add_columns_to_oauth_clients_table.php b/migrations/2023_09_29_add_columns_to_oauth_clients_table.php
index acb44b0..7faf001 100644
--- a/migrations/2023_09_29_add_columns_to_oauth_clients_table.php
+++ b/migrations/2023_09_29_add_columns_to_oauth_clients_table.php
@@ -12,8 +12,8 @@
 use Flarum\Database\Migration;
 
 return Migration::addColumns('oauth_clients', [
-    'client_name' => ['string', 'default' => null, 'nullable' => true],
-    'client_icon' => ['string', 'default' => null, 'nullable' => true],
-    'client_desc' => ['string', 'default' => null, 'nullable' => true],
-    'client_home' => ['string', 'default' => null, 'nullable' => true],
+    'client_name' => ['string', 'length' => 500, 'default' => null, 'nullable' => true],
+    'client_icon' => ['string', 'length' => 500, 'default' => null, 'nullable' => true],
+    'client_desc' => ['string', 'length' => 1000, 'default' => null, 'nullable' => true],
+    'client_home' => ['string', 'length' => 200, 'default' => null, 'nullable' => true],
 ]);
diff --git a/migrations/2023_09_29_add_columns_to_oauth_scopes_table.php b/migrations/2023_09_29_add_columns_to_oauth_scopes_table.php
index e12c30e..e8eb891 100644
--- a/migrations/2023_09_29_add_columns_to_oauth_scopes_table.php
+++ b/migrations/2023_09_29_add_columns_to_oauth_scopes_table.php
@@ -12,7 +12,7 @@
 use Flarum\Database\Migration;
 
 return Migration::addColumns('oauth_scopes', [
-    'scope_name' => ['string', 'default' => null, 'nullable' => true],
-    'scope_icon' => ['string', 'default' => null, 'nullable' => true],
-    'scope_desc' => ['string', 'default' => null, 'nullable' => true],
+    'scope_name' => ['string', 'length' => 500, 'default' => null, 'nullable' => true],
+    'scope_icon' => ['string', 'length' => 500, 'default' => null, 'nullable' => true],
+    'scope_desc' => ['string', 'length' => 1000, 'default' => null, 'nullable' => true],
 ]);