diff --git a/boundier/storage/sqlite_store.py b/boundier/storage/sqlite_store.py
index 7cdbcad..417642f 100644
--- a/boundier/storage/sqlite_store.py
+++ b/boundier/storage/sqlite_store.py
@@ -12,10 +12,10 @@ def __init__(self, db_path: str = "boundier.db", schema_path: str = "schema.sql"
         self.schema_path = schema_path
         self.memory_dir = memory_dir
         self._init_db()
-
     def _get_conn(self):
         conn = sqlite3.connect(self.db_path, timeout=30.0)
         conn.row_factory = sqlite3.Row
+        conn.execute("PRAGMA foreign_keys = ON")
         return conn
 
     def _init_db(self):