diff --git a/EDILibraryTests/EDILibraryTests.csproj b/EDILibraryTests/EDILibraryTests.csproj
index c6a6862..0d44df3 100644
--- a/EDILibraryTests/EDILibraryTests.csproj
+++ b/EDILibraryTests/EDILibraryTests.csproj
@@ -11,7 +11,7 @@
         <PackageReference Include="MSTest.TestFramework" Version="3.6.2" />
         <PackageReference Include="coverlet.collector" Version="6.0.2" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-        <PackageReference Include="NSubstitute" Version="5.1.0" />
+        <PackageReference Include="NSubstitute" Version="5.3.0" />
     </ItemGroup>
 
     <ItemGroup>