diff --git a/Sources/GzipArchive.swift b/Sources/GzipArchive.swift
index cecd47c8..8095bec0 100644
--- a/Sources/GzipArchive.swift
+++ b/Sources/GzipArchive.swift
@@ -41,7 +41,7 @@ public class GzipArchive: Archive {
         let magic: [UInt8]
         let method: UInt8
         let flags: UInt8
-        let mtime: UInt64
+        let mtime: [UInt8]
         let extraFlags: UInt8
         let osType: UInt8
         // Starting point of compressed data. Depends on presence of optional fields.
@@ -72,7 +72,7 @@ public class GzipArchive: Archive {
         var serviceInfo = ServiceInfo(magic: magic,
                                       method: method,
                                       flags: data[3],
-                                      mtime: Data(data[4...7]).to(type: UInt64.self),
+                                      mtime: data.bytes(from: 4..<8),
                                       extraFlags: data[8],
                                       osType: data[9],
                                       startPoint: 10,
diff --git a/Tests/GzipTests.swift b/Tests/GzipTests.swift
index 1417fbe6..dafddd94 100644
--- a/Tests/GzipTests.swift
+++ b/Tests/GzipTests.swift
@@ -28,7 +28,7 @@ class GzipTests: XCTestCase {
         let answerServiceInfo = GzipArchive.ServiceInfo(magic: [31, 139],
                                                         method: 8,
                                                         flags: 8,
-                                                        mtime: 1477672923,
+                                                        mtime: [219, 127, 19, 88],
                                                         extraFlags: 0,
                                                         osType: 3,
                                                         startPoint: 19,
@@ -54,7 +54,7 @@ class GzipTests: XCTestCase {
         let answerServiceInfo = GzipArchive.ServiceInfo(magic: [31, 139],
                                                         method: 8,
                                                         flags: 8,
-                                                        mtime: 1479237057,
+                                                        mtime: [193, 93, 43, 88],
                                                         extraFlags: 0,
                                                         osType: 3,
                                                         startPoint: 23,
@@ -80,7 +80,7 @@ class GzipTests: XCTestCase {
         let answerServiceInfo = GzipArchive.ServiceInfo(magic: [31, 139],
                                                         method: 8,
                                                         flags: 8,
-                                                        mtime: 1479237147,
+                                                        mtime: [27, 94, 43, 88],
                                                         extraFlags: 0,
                                                         osType: 3,
                                                         startPoint: 23,
@@ -106,7 +106,7 @@ class GzipTests: XCTestCase {
         let answerServiceInfo = GzipArchive.ServiceInfo(magic: [31, 139],
                                                         method: 8,
                                                         flags: 8,
-                                                        mtime: 1477673662,
+                                                        mtime: [190, 130, 19, 88],
                                                         extraFlags: 0,
                                                         osType: 3,
                                                         startPoint: 25,
@@ -133,7 +133,7 @@ class GzipTests: XCTestCase {
         let answerServiceInfo = GzipArchive.ServiceInfo(magic: [31, 139],
                                                         method: 8,
                                                         flags: 8,
-                                                        mtime: 1477764584,
+                                                        mtime: [232, 229, 20, 88],
                                                         extraFlags: 0,
                                                         osType: 3,
                                                         startPoint: 20,
@@ -159,7 +159,7 @@ class GzipTests: XCTestCase {
         let answerServiceInfo = GzipArchive.ServiceInfo(magic: [31, 139],
                                                         method: 8,
                                                         flags: 8,
-                                                        mtime: 1479237483,
+                                                        mtime: [107, 95, 43, 88],
                                                         extraFlags: 0,
                                                         osType: 3,
                                                         startPoint: 23,
@@ -185,7 +185,7 @@ class GzipTests: XCTestCase {
         let answerServiceInfo = GzipArchive.ServiceInfo(magic: [31, 139],
                                                         method: 8,
                                                         flags: 8,
-                                                        mtime: 1479559913,
+                                                        mtime: [233, 74, 48, 88],
                                                         extraFlags: 0,
                                                         osType: 3,
                                                         startPoint: 23,