diff --git a/ArticlesDatabase/Package.swift b/ArticlesDatabase/Package.swift
index 23655bc5e..ea6ff83de 100644
--- a/ArticlesDatabase/Package.swift
+++ b/ArticlesDatabase/Package.swift
@@ -27,6 +27,10 @@ let package = Package(
 				"Articles",
 				"FMDB",
 				"FoundationExtras"
-			]),
-    ]
+			],
+			swiftSettings: [
+				.enableExperimentalFeature("StrictConcurrency")
+			]
+		)
+	]
 )
diff --git a/CloudKitSync/Package.swift b/CloudKitSync/Package.swift
index d7cc608d6..f2cb8d2fd 100644
--- a/CloudKitSync/Package.swift
+++ b/CloudKitSync/Package.swift
@@ -28,6 +28,9 @@ let package = Package(
 				"Core",
 				"Web",
 				"Parser"
+			],
+			swiftSettings: [
+				.enableExperimentalFeature("StrictConcurrency")
 			]
 		),
 		.testTarget(