diff --git a/Sources/GISTools/GeoJson/GeoJsonCodable.swift b/Sources/GISTools/GeoJson/GeoJsonCodable.swift
index a9b174b..e22f1e8 100644
--- a/Sources/GISTools/GeoJson/GeoJsonCodable.swift
+++ b/Sources/GISTools/GeoJson/GeoJsonCodable.swift
@@ -91,6 +91,7 @@ extension Coordinate3D: Codable {
 
 // MARK: - SwiftData compatibility (see the README)
 
+#if canImport(SwiftData)
 @objc(GeoJsonTransformer)
 public final class GeoJsonTransformer: ValueTransformer {
 
@@ -124,6 +125,7 @@ public final class GeoJsonTransformer: ValueTransformer {
     }
 
 }
+#endif
 
 // MARK: - Private
 
diff --git a/Tests/GISToolsTests/GeoJson/SwiftDataTests.swift b/Tests/GISToolsTests/GeoJson/SwiftDataTests.swift
index 6c6cc82..62a9684 100644
--- a/Tests/GISToolsTests/GeoJson/SwiftDataTests.swift
+++ b/Tests/GISToolsTests/GeoJson/SwiftDataTests.swift
@@ -1,8 +1,10 @@
 @testable import GISTools
-import SwiftData
 import XCTest
 
-@available(macOS 14, *)
+#if canImport(SwiftData)
+import SwiftData
+
+@available(macOS 14, iOS 17, watchOS 10, tvOS 17, *)
 final class SwiftDataTests: XCTestCase {
 
     @Model
@@ -56,3 +58,4 @@ final class SwiftDataTests: XCTestCase {
     }
 
 }
+#endif