diff --git a/ClosedXML/ClosedXML.csproj b/ClosedXML/ClosedXML.csproj
index 18f8d953c..18f2051b0 100644
--- a/ClosedXML/ClosedXML.csproj
+++ b/ClosedXML/ClosedXML.csproj
@@ -62,7 +62,7 @@
 	</ItemGroup>
 
 	<ItemGroup Condition="$(TargetFramework.StartsWith('net4'))">
-		<PackageReference Include="System.IO.Packaging" Version="6.0.0" />
+		<PackageReference Include="System.IO.Packaging" Version="7.0.0" />
 	</ItemGroup>
 
 	<ItemGroup>