diff --git a/Package.swift b/Package.swift
index 905f676..facffa8 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version: 6.0
+// swift-tools-version: 6.1
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
diff --git a/README.md b/README.md
index 3e0d1a9..f187167 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 ![Build](https://github.com/codefiesta/VimKit/actions/workflows/swift.yml/badge.svg)
 ![Xcode 16.4+](https://img.shields.io/badge/Xcode-16.4%2B-gold.svg)
-![Swift 6.0+](https://img.shields.io/badge/Swift-6.0%2B-tomato.svg)
+![Swift 6.1+](https://img.shields.io/badge/Swift-6.1%2B-tomato.svg)
 ![iOS 18.0+](https://img.shields.io/badge/iOS-18.0%2B-crimson.svg)
 ![visionOS 2.0+](https://img.shields.io/badge/visionOS-2.0%2B-magenta.svg)
 ![macOS 15.0+](https://img.shields.io/badge/macOS-15.0%2B-skyblue.svg)
diff --git a/Sources/VimKit/Database+Importer.swift b/Sources/VimKit/Database+Importer.swift
index 514ee3a..2ee6397 100644
--- a/Sources/VimKit/Database+Importer.swift
+++ b/Sources/VimKit/Database+Importer.swift
@@ -177,7 +177,7 @@ extension Database {
         ///   - modelType: the type of model
         private func warmCache(_ modelType: any IndexedPersistentModel.Type) {
             guard let table = database.tables[modelType.modelName] else { return }
-            modelType.warm(table: table, cache: cache)
+            _ = modelType.warm(table: table, cache: cache)
         }
 
         /// Imports models of the specified type into the model container.
diff --git a/Sources/VimKit/Database+Models.swift b/Sources/VimKit/Database+Models.swift
index e8ce77f..bb535ff 100644
--- a/Sources/VimKit/Database+Models.swift
+++ b/Sources/VimKit/Database+Models.swift
@@ -69,6 +69,7 @@ extension IndexedPersistentModel {
     ///   - table: the database table that contains the raw data
     ///   - cache: the cache to warm
     /// - Returns: the cached objects.
+    @discardableResult
     static func warm(table: Database.Table, cache: Database.ImportCache) -> [Self] {
         cache.warm(table)
     }