diff --git a/src/server/db/schema.ts b/src/server/db/schema.ts
index fe29446..0039945 100644
--- a/src/server/db/schema.ts
+++ b/src/server/db/schema.ts
@@ -21,7 +21,9 @@ export const producers = createTable(
     name: text("name").notNull().unique(),
     description: text("description"),
     imageUrl: text("imageUrl"),
-    countryId: uuid("countryId").notNull(),
+    countryId: uuid("countryId")
+      .references(() => countries.id, { onDelete: "cascade" })
+      .notNull(),
     createdAt: timestamp("createdAt").defaultNow().notNull(),
     updatedAt: timestamp("updatedAt").defaultNow(),
   },
@@ -52,7 +54,9 @@ export const wines = createTable("wine", {
   type: typeEnum("type").notNull(),
   description: text("description"),
   imageUrl: text("imageUrl"),
-  producerId: uuid("producerId").notNull(),
+  producerId: uuid("producerId")
+    .references(() => producers.id, { onDelete: "cascade" })
+    .notNull(),
   subRegionId: uuid("subRegionId"),
   regionId: uuid("regionId").notNull(),
   countryId: uuid("countryId").notNull(),
@@ -87,7 +91,9 @@ export const subRegions = createTable(
   {
     id: uuid("id").primaryKey().notNull().defaultRandom(),
     name: text("name").notNull().unique(),
-    regionId: uuid("regionId").notNull(),
+    regionId: uuid("regionId")
+      .references(() => regions.id, { onDelete: "cascade" })
+      .notNull(),
   },
   (t) => ({
     uniqueSubRegion: unique().on(t.name, t.regionId),
@@ -107,7 +113,9 @@ export const regions = createTable(
   {
     id: uuid("id").primaryKey().notNull().defaultRandom(),
     name: text("name").notNull(),
-    countryId: uuid("countryId").notNull(),
+    countryId: uuid("countryId")
+      .references(() => countries.id, { onDelete: "cascade" })
+      .notNull(),
   },
   (t) => ({
     uniqueRegion: unique().on(t.name, t.countryId),