diff --git a/backend/streetdrop-domain/src/main/resources/db/migration/V20240606__add_announcement_table.sql b/backend/streetdrop-domain/src/main/resources/db/migration/V20240606__add_announcement_table.sql
index 86727483..8806bc7e 100644
--- a/backend/streetdrop-domain/src/main/resources/db/migration/V20240606__add_announcement_table.sql
+++ b/backend/streetdrop-domain/src/main/resources/db/migration/V20240606__add_announcement_table.sql
@@ -3,5 +3,6 @@ CREATE TABLE IF NOT EXISTS announcement (
     title VARCHAR(200) NOT NULL,
     content VARCHAR(3000) NOT NULL,
     created_at DATETIME(6) NOT NULL,
-    modified_at DATETIME(6) NOT NULL
+    modified_at DATETIME(6) NOT NULL,
+    PRIMARY KEY (announcement_id)
 )
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