diff --git a/MatFileHandler.Tests/MatFileReaderTests.cs b/MatFileHandler.Tests/MatFileReaderTests.cs
index b317cf3..fd35342 100755
--- a/MatFileHandler.Tests/MatFileReaderTests.cs
+++ b/MatFileHandler.Tests/MatFileReaderTests.cs
@@ -449,6 +449,19 @@ namespace MatFileHandler.Tests
             Assert.That(duration[2], Is.EqualTo(new TimeSpan(1, 3, 5)));
         }
 
+        /// <summary>
+        /// Test unrepresentable datetime.
+        /// </summary>
+        [Test]
+        public void TestDatetime_Unrepresentable()
+        {
+            var matFile = GetTests("good")["datetime-unrepresentable"];
+            var obj = matFile["d"].Value as IMatObject;
+            var datetime = new DatetimeAdapter(obj);
+            var d0 = datetime[0];
+            Assert.That(d0, Is.Null);
+        }
+
         private static AbstractTestDataFactory<IMatFile> GetTests(string factoryName) =>
             new MatTestDataFactory(Path.Combine(TestDirectory, factoryName));
 
diff --git a/MatFileHandler.Tests/test-data/good/datetime-unrepresentable.mat b/MatFileHandler.Tests/test-data/good/datetime-unrepresentable.mat
new file mode 100644
index 0000000..9988076
Binary files /dev/null and b/MatFileHandler.Tests/test-data/good/datetime-unrepresentable.mat differ
diff --git a/MatFileHandler.sln b/MatFileHandler.sln
index 0c4a142..ad160eb 100755
--- a/MatFileHandler.sln
+++ b/MatFileHandler.sln
@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.28107.0
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.28621.142
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MatFileHandler", "MatFileHandler\MatFileHandler.csproj", "{C0CD11D3-016A-4FCD-AF0B-D745F79F3749}"
 EndProject
@@ -9,6 +9,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MatFileHandler.Tests", "Mat
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{2CF58D3D-4CEC-419B-AD67-58665A888BDF}"
 	ProjectSection(SolutionItems) = preProject
+		LICENSE.md = LICENSE.md
 		MatFileHandler\Objects.md = MatFileHandler\Objects.md
 		README.md = README.md
 	EndProjectSection
diff --git a/MatFileHandler/DatetimeAdapter.cs b/MatFileHandler/DatetimeAdapter.cs
index c86371f..bdac59f 100644
--- a/MatFileHandler/DatetimeAdapter.cs
+++ b/MatFileHandler/DatetimeAdapter.cs
@@ -56,7 +56,18 @@ namespace MatFileHandler
         /// Gets values of datetime object at given position in the array converted to <see cref="DateTimeOffset"/>.
         /// </summary>
         /// <param name="list">Indices.</param>
-        /// <returns>Value converted to  <see cref="DateTimeOffset"/>.</returns>
-        public DateTimeOffset this[params int[] list] => epoch.AddMilliseconds(data[Dimensions.DimFlatten(list)]);
+        /// <returns>Value converted to <see cref="DateTimeOffset"/>; null if the resulting value is unrepresentable.</returns>
+        public DateTimeOffset? this[params int[] list]
+        {
+            get
+            {
+                var milliseconds = data[Dimensions.DimFlatten(list)];
+                if (milliseconds < -62_135_596_800_000.0 || milliseconds > 253_402_300_799_999.0)
+                {
+                    return null;
+                }
+                return epoch.AddMilliseconds(milliseconds);
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/MatFileHandler/MatFileHandler.csproj b/MatFileHandler/MatFileHandler.csproj
index 7152830..6e87fc5 100755
--- a/MatFileHandler/MatFileHandler.csproj
+++ b/MatFileHandler/MatFileHandler.csproj
@@ -1,13 +1,13 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0;net461</TargetFrameworks>
-    <PackageVersion>1.3.0-beta3</PackageVersion>
+    <PackageVersion>1.3.0-beta4</PackageVersion>
     <PackageId>MatFileHandler</PackageId>
     <Title>A library for reading and writing MATLAB .mat files.</Title>
     <Authors>Alexander Luzgarev</Authors>
     <Description>MatFileHandler provides a simple interface for reading and writing MATLAB .mat files (of so-called "Level 5") and extracting the contents of numerical arrays, logical arrays, sparse arrays, char arrays, cell arrays and structure arrays.</Description>
     <Copyright>Copyright 2017-2018 Alexander Luzgarev</Copyright>
-    <PackageLicenseUrl>https://raw.githubusercontent.com/mahalex/MatFileHandler/master/LICENSE.md</PackageLicenseUrl>
+    <PackageLicenseFile>LICENSE.md</PackageLicenseFile>
     <PackageProjectUrl>https://github.com/mahalex/MatFileHandler</PackageProjectUrl>
     <PackageReleaseNotes>First release.</PackageReleaseNotes>
     <PackageTags>Matlab</PackageTags>
@@ -31,4 +31,7 @@
     </PackageReference>
     <PackageReference Include="System.ValueTuple" Version="4.4.0" Condition="'$(TargetFramework)' == 'net461'" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+  <ItemGroup>
+    <None Include="..\LICENSE.md" Pack="true" PackagePath=""/>
+  </ItemGroup>
+</Project>