diff --git a/ooxml/NPOI.OOXML.Core.csproj b/ooxml/NPOI.OOXML.Core.csproj
index 3b662e020..111b0657a 100644
--- a/ooxml/NPOI.OOXML.Core.csproj
+++ b/ooxml/NPOI.OOXML.Core.csproj
@@ -27,7 +27,7 @@
 
   <ItemGroup>
     <PackageReference Include="System.Security.Cryptography.Xml" />
-    <PackageReference Include="System.Security.Cryptography.Pkcs" />
+    <PackageReference Include="System.Security.Cryptography.Pkcs" Condition="!$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0'))" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/testcases/ooxml/XSSF/UserModel/TestXSSFName.cs b/testcases/ooxml/XSSF/UserModel/TestXSSFName.cs
index 08fcefdc2..af54b614f 100644
--- a/testcases/ooxml/XSSF/UserModel/TestXSSFName.cs
+++ b/testcases/ooxml/XSSF/UserModel/TestXSSFName.cs
@@ -150,7 +150,7 @@ namespace TestCases.XSSF.UserModel
                     name.NameName = ref1;
                     Assert.Fail("cell addresses are not allowed: " + ref1);
                 }
-                catch (ArgumentException e)
+                catch (ArgumentException)
                 {
                     // expected
                 }