diff --git a/.github/workflows/swift.yml b/.github/workflows/swift.yml
index 2b08431b..87e82266 100644
--- a/.github/workflows/swift.yml
+++ b/.github/workflows/swift.yml
@@ -2,9 +2,9 @@ name: Swift
 
 on:
   push:
-    branches: [development]
+    branches: [development, develop]
   pull_request:
-    branches: [development]
+    branches: [development, develop]
 
 jobs:
   Xcode:
diff --git a/Package.swift b/Package.swift
index 3f93674c..696664b3 100644
--- a/Package.swift
+++ b/Package.swift
@@ -21,7 +21,7 @@ let targets: [Target] = [
 let package = Package(
     name: "ReadiumZIPFoundation",
     platforms: [
-        .macOS(.v10_13), .iOS(.v13), .tvOS(.v12), .watchOS(.v4), .visionOS(.v1)
+        .macOS(.v11), .iOS(.v13), .tvOS(.v12), .watchOS(.v4), .visionOS(.v1)
     ],
     products: [
         .library(name: "ReadiumZIPFoundation", targets: ["ReadiumZIPFoundation"])
diff --git a/Sources/ZIPFoundation/Data+Serialization.swift b/Sources/ZIPFoundation/Data+Serialization.swift
index 7f51ee81..0e954db3 100644
--- a/Sources/ZIPFoundation/Data+Serialization.swift
+++ b/Sources/ZIPFoundation/Data+Serialization.swift
@@ -16,7 +16,11 @@ public typealias FILEPointer = OpaquePointer
 public typealias FILEPointer = UnsafeMutablePointer<FILE>
 #endif
 
+#if swift(>=6)
 extension FILEPointer: @unchecked @retroactive Sendable {}
+#else
+extension FILEPointer: @unchecked Sendable {}
+#endif
 
 protocol DataSerializable {
     static var size: Int { get }