diff --git a/setup.sql b/setup.sql
index b16da27..48b8718 100644
--- a/setup.sql
+++ b/setup.sql
@@ -34,7 +34,7 @@ CREATE TABLE IF NOT EXISTS `bots` (
   FOREIGN KEY (`credentials_id`) REFERENCES credentials(id) ON DELETE CASCADE
 ) ENGINE=INNODB;
 CREATE TABLE IF NOT EXISTS `fedi_account` (
-  `handle` VARCHAR(128) NOT NULL PRIMARY KEY,
+  `handle` VARCHAR(128) PRIMARY KEY,
   `outbox` VARCHAR(256),
   `credentials_id` INT NOT NULL,
   `icon` VARCHAR(512),
@@ -43,9 +43,11 @@ CREATE TABLE IF NOT EXISTS `fedi_account` (
 ) ENGINE=INNODB;
 CREATE TABLE IF NOT EXISTS `posts` (
   `id` BIGINT AUTO_INCREMENT PRIMARY KEY,
+  `fedi_id` VARCHAR(128),
   `post_id` VARCHAR(64) NOT NULL,
   `content` TEXT NOT NULL,
-  `cw` BOOLEAN NOT NULL
+  `cw` BOOLEAN NOT NULL,
+  FOREIGN KEY (`fedi_id`) REFERENCES fedi_account(handle) ON DELETE CASCADE;
 ) ENGINE=INNODB;
 CREATE TABLE IF NOT EXISTS `word_blacklist` (
   `id` INT AUTO_INCREMENT PRIMARY KEY,