diff --git a/src/SimpleFixture.NSubstitute/SimpleFixture.NSubstitute.csproj b/src/SimpleFixture.NSubstitute/SimpleFixture.NSubstitute.csproj
index aa75d8a..05ca585 100644
--- a/src/SimpleFixture.NSubstitute/SimpleFixture.NSubstitute.csproj
+++ b/src/SimpleFixture.NSubstitute/SimpleFixture.NSubstitute.csproj
@@ -38,7 +38,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="NSubstitute" Version="2.0.3" />
+    <PackageReference Include="NSubstitute" Version="3.1.0" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net45' ">