diff --git a/orm/tables/process.py b/orm/tables/process.py
index 8b67e32..f69d9fd 100644
--- a/orm/tables/process.py
+++ b/orm/tables/process.py
@@ -109,10 +109,10 @@ node_link_table = Table(
     Column("id", UnsignedInt, autoincrement=True,
            primary_key=True, nullable=False),
     Column("link_name", String(20), nullable=False),
-    Column("node_id", UnsignedInt, ForeignKey("ps_node.id"), nullable=False),
+    Column("node_id", UnsignedInt, ForeignKey("ps_node.id", ondelete='CASCADE'), nullable=False),
     Column("link_point_id", UnsignedInt, nullable=False),
     Column("next_node_id", UnsignedInt, ForeignKey(
-        "ps_node.id"), nullable=False),
+        "ps_node.id", ondelete='CASCADE'), nullable=False),
     Column("settings", JSON, default={}),
     Column("creator_id", UnsignedInt, ForeignKey(
         "account.id"), nullable=False),