diff --git a/backend/migrations/00004_create_inventory_items_table.sql b/backend/migrations/00004_create_inventory_items_table.sql
index eaf6945..905726f 100644
--- a/backend/migrations/00004_create_inventory_items_table.sql
+++ b/backend/migrations/00004_create_inventory_items_table.sql
@@ -1,6 +1,7 @@
 -- +goose Up
 CREATE TABLE inventory_items (
     id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    user_id UUID NOT NULL,
     name TEXT NOT NULL,
     category TEXT NOT NULL,
     type TEXT NOT NULL,
@@ -9,8 +10,11 @@ CREATE TABLE inventory_items (
     date_added TIMESTAMPTZ NOT NULL,
     status TEXT NOT NULL,
     created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
-    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    CONSTRAINT fk_inventory_items_user FOREIGN KEY (user_id) REFERENCES users(uuid) ON DELETE CASCADE
 );
 
-CREATE INDEX idx_inventory_items_category ON inventory_items(category);
-CREATE INDEX idx_inventory_items_status ON inventory_items(status);
+-- Create indexes
+CREATE INDEX idx_inventory_items_user_id ON inventory_items(user_id);
+CREATE INDEX idx_inventory_items_user_category ON inventory_items(user_id, category);
+CREATE INDEX idx_inventory_items_user_status ON inventory_items(user_id, status);