diff --git a/src/dotnetCampus.OpenXMLUnitConverter/MillisecondTime.cs b/src/dotnetCampus.OpenXMLUnitConverter/MillisecondTime.cs
index f0ef3a1..4c82e26 100644
--- a/src/dotnetCampus.OpenXMLUnitConverter/MillisecondTime.cs
+++ b/src/dotnetCampus.OpenXMLUnitConverter/MillisecondTime.cs
@@ -26,8 +26,7 @@ public MillisecondTime(StringValue? millisecond)
                 Milliseconds = value;
                 IsIndefinite = false;
             }
-            else if (Enum.TryParse<IndefiniteTimeDeclarationValues>(millisecond, true, out var result)
-                     && result == IndefiniteTimeDeclarationValues.Indefinite)
+            else if (new IndefiniteTimeDeclarationValues(millisecond) == IndefiniteTimeDeclarationValues.Indefinite)
             {
                 Milliseconds = long.MaxValue;
                 IsIndefinite = true;
diff --git a/src/dotnetCampus.OpenXmlUnitConverter/dotnetCampus.OpenXmlUnitConverter.csproj b/src/dotnetCampus.OpenXmlUnitConverter/dotnetCampus.OpenXmlUnitConverter.csproj
index 4aa3f69..5ebc6a5 100644
--- a/src/dotnetCampus.OpenXmlUnitConverter/dotnetCampus.OpenXmlUnitConverter.csproj
+++ b/src/dotnetCampus.OpenXmlUnitConverter/dotnetCampus.OpenXmlUnitConverter.csproj
@@ -20,7 +20,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="DocumentFormat.OpenXml" Version="2.13.0" />
+    <PackageReference Include="DocumentFormat.OpenXml" Version="3.2.0" />
   </ItemGroup>
 
 
diff --git a/tests/dotnetCampus.OpenXmlUnitConverter.Tests/MillisecondTimeTest.cs b/tests/dotnetCampus.OpenXmlUnitConverter.Tests/MillisecondTimeTest.cs
index 584ce2d..2bde6be 100644
--- a/tests/dotnetCampus.OpenXmlUnitConverter.Tests/MillisecondTimeTest.cs
+++ b/tests/dotnetCampus.OpenXmlUnitConverter.Tests/MillisecondTimeTest.cs
@@ -32,7 +32,8 @@ public void ParseMillisecondTimeText()
 
             "传入未定义的 OpenXML 字符串，可以说明未解析".Test(() =>
             {
-                var stringValue = new StringValue(IndefiniteTimeDeclarationValues.Indefinite.ToString());
+                var indefinite = (IEnumValue)IndefiniteTimeDeclarationValues.Indefinite;
+                var stringValue = new StringValue(indefinite.Value);
                 var millisecondTime = new MillisecondTime(stringValue);
                 Assert.AreEqual(true, millisecondTime.IsIndefinite);
             });