diff --git a/Sources/Orders/OrdersServiceCustom.swift b/Sources/Orders/OrdersServiceCustom.swift
index eb49ca0..057ee44 100644
--- a/Sources/Orders/OrdersServiceCustom.swift
+++ b/Sources/Orders/OrdersServiceCustom.swift
@@ -391,18 +391,16 @@ extension OrdersServiceCustom {
 
 // MARK: - order file generation
 extension OrdersServiceCustom {
-    private static func generateManifestFile(
-        using encoder: JSONEncoder, in root: URL
-    ) throws -> Data {
+    private static func generateManifestFile(using encoder: JSONEncoder, in root: URL) throws -> Data {
         var manifest: [String: String] = [:]
         let paths = try FileManager.default.subpathsOfDirectory(atPath: root.path)
         for relativePath in paths {
             let file = URL(fileURLWithPath: relativePath, relativeTo: root)
             guard !file.hasDirectoryPath else { continue }
-            let data = try Data(contentsOf: file)
-            let hash = SHA256.hash(data: data)
-            manifest[relativePath] = hash.map { "0\(String($0, radix: 16))".suffix(2) }.joined()
+            manifest[relativePath] = try SHA256.hash(data: Data(contentsOf: file)).hex
         }
+        // Write the manifest file to the root directory
+        // and return the data for using it in signing.
         let data = try encoder.encode(manifest)
         try data.write(to: root.appendingPathComponent("manifest.json"))
         return data
diff --git a/Sources/Passes/PassesServiceCustom.swift b/Sources/Passes/PassesServiceCustom.swift
index e1d83b0..b3893bf 100644
--- a/Sources/Passes/PassesServiceCustom.swift
+++ b/Sources/Passes/PassesServiceCustom.swift
@@ -502,10 +502,10 @@ extension PassesServiceCustom {
         for relativePath in paths {
             let file = URL(fileURLWithPath: relativePath, relativeTo: root)
             guard !file.hasDirectoryPath else { continue }
-            let data = try Data(contentsOf: file)
-            let hash = Insecure.SHA1.hash(data: data)
-            manifest[relativePath] = hash.map { "0\(String($0, radix: 16))".suffix(2) }.joined()
+            manifest[relativePath] = try Insecure.SHA1.hash(data: Data(contentsOf: file)).hex
         }
+        // Write the manifest file to the root directory
+        // and return the data for using it in signing.
         let data = try encoder.encode(manifest)
         try data.write(to: root.appendingPathComponent("manifest.json"))
         return data
diff --git a/Tests/OrdersTests/OrdersTests.swift b/Tests/OrdersTests/OrdersTests.swift
index e653da4..247e4de 100644
--- a/Tests/OrdersTests/OrdersTests.swift
+++ b/Tests/OrdersTests/OrdersTests.swift
@@ -34,7 +34,7 @@ struct OrdersTests {
             let manifestJSONData = try String(contentsOfFile: orderFolder.path.appending("/manifest.json")).data(using: .utf8)
             let manifestJSON = try decoder.decode([String: String].self, from: manifestJSONData!)
             let iconData = try Data(contentsOf: orderFolder.appendingPathComponent("/icon.png"))
-            let iconHash = Array(SHA256.hash(data: iconData)).hex
+            let iconHash = SHA256.hash(data: iconData).hex
             #expect(manifestJSON["icon.png"] == iconHash)
             #expect(manifestJSON["pet_store_logo.png"] != nil)
         }
diff --git a/Tests/PassesTests/PassesTests.swift b/Tests/PassesTests/PassesTests.swift
index 60d8f0c..7f87345 100644
--- a/Tests/PassesTests/PassesTests.swift
+++ b/Tests/PassesTests/PassesTests.swift
@@ -35,7 +35,7 @@ struct PassesTests {
             let manifestJSONData = try String(contentsOfFile: passFolder.path.appending("/manifest.json")).data(using: .utf8)
             let manifestJSON = try decoder.decode([String: String].self, from: manifestJSONData!)
             let iconData = try Data(contentsOf: passFolder.appendingPathComponent("/icon.png"))
-            let iconHash = Array(Insecure.SHA1.hash(data: iconData)).hex
+            let iconHash = Insecure.SHA1.hash(data: iconData).hex
             #expect(manifestJSON["icon.png"] == iconHash)
             #expect(manifestJSON["logo.png"] != nil)
             #expect(manifestJSON["personalizationLogo.png"] != nil)
@@ -93,7 +93,7 @@ struct PassesTests {
             let manifestJSONData = try String(contentsOfFile: passFolder.path.appending("/manifest.json")).data(using: .utf8)
             let manifestJSON = try decoder.decode([String: String].self, from: manifestJSONData!)
             let iconData = try Data(contentsOf: passFolder.appendingPathComponent("/personalizationLogo.png"))
-            let iconHash = Array(Insecure.SHA1.hash(data: iconData)).hex
+            let iconHash = Insecure.SHA1.hash(data: iconData).hex
             #expect(manifestJSON["personalizationLogo.png"] == iconHash)
         }
     }