diff --git a/apps/reminder-worker/wrangler.jsonc b/apps/reminder-worker/wrangler.jsonc
index 24024e4..d1511be 100644
--- a/apps/reminder-worker/wrangler.jsonc
+++ b/apps/reminder-worker/wrangler.jsonc
@@ -15,7 +15,7 @@
     {
       "binding": "DB",
       "database_name": "kanban-db",
-      "database_id": "replace-with-production-database-id",
+      "database_id": "5f20a0e8-27aa-46dd-9b4a-aee7ae1a5e9c",
       "migrations_dir": "../../packages/db/migrations",
     },
   ],
diff --git a/apps/web/wrangler.jsonc b/apps/web/wrangler.jsonc
index 4b77f8d..d7424a7 100644
--- a/apps/web/wrangler.jsonc
+++ b/apps/web/wrangler.jsonc
@@ -12,7 +12,7 @@
     {
       "binding": "DB",
       "database_name": "kanban-db",
-      "database_id": "replace-with-production-database-id",
+      "database_id": "5f20a0e8-27aa-46dd-9b4a-aee7ae1a5e9c",
       "migrations_dir": "../../packages/db/migrations",
     },
   ],
@@ -56,7 +56,7 @@
         {
           "binding": "DB",
           "database_name": "kanban-db-preview",
-          "database_id": "replace-with-preview-database-id",
+          "database_id": "3e03d55d-c10d-46fc-8014-9adcec53b7b2",
           "migrations_dir": "../../packages/db/migrations",
         },
       ],
diff --git a/docs/deploy.md b/docs/deploy.md
index 42b556c..ab27eee 100644
--- a/docs/deploy.md
+++ b/docs/deploy.md
@@ -45,7 +45,7 @@ pnpm exec wrangler r2 bucket create kanban-files-preview
 pnpm exec wrangler queues create kanban-notifications-preview
 ```
 
-`database_id` を書く場所 (いまは `replace-with-…` になっている):
+`database_id` を書く場所 (ut-code のアカウントに作成済みで、書き込み済み):
 
 - `apps/web/wrangler.jsonc` の `d1_databases` (本番) と `env.preview.d1_databases` (プレビュー)
 - `apps/reminder-worker/wrangler.jsonc` の `d1_databases` (本番。リマインドの対象を探すため、Web と同じ DB を指す)