diff --git a/tests/Guildsmith.Tests/Guildsmith.Tests.csproj b/tests/Guildsmith.Tests/Guildsmith.Tests.csproj
index 3f25b61..a1729d1 100644
--- a/tests/Guildsmith.Tests/Guildsmith.Tests.csproj
+++ b/tests/Guildsmith.Tests/Guildsmith.Tests.csproj
@@ -8,7 +8,7 @@
   <ItemGroup>
     <PackageReference Include="coverlet.collector" Version="6.0.4" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
-    <PackageReference Include="NSubstitute" Version="5.3.0" />
+    <PackageReference Include="NSubstitute" Version="6.2.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5" />
   </ItemGroup>
diff --git a/tests/Guildsmith.Tests/packages.lock.json b/tests/Guildsmith.Tests/packages.lock.json
index 05e0a3f..03e52b9 100644
--- a/tests/Guildsmith.Tests/packages.lock.json
+++ b/tests/Guildsmith.Tests/packages.lock.json
@@ -20,9 +20,9 @@
       },
       "NSubstitute": {
         "type": "Direct",
-        "requested": "[5.3.0, )",
-        "resolved": "5.3.0",
-        "contentHash": "lJ47Cps5Qzr86N99lcwd+OUvQma7+fBgr8+Mn+aOC0WrlqMNkdivaYD9IvnZ5Mqo6Ky3LS7ZI+tUq1/s9ERd0Q==",
+        "requested": "[6.2.0, )",
+        "resolved": "6.2.0",
+        "contentHash": "05oaAmBAvYYUQb/NTb9/kWBDjq0iS772X4t428WJcHRcH+5ULJx6rTbEvqkZJBIHWRLI8MlU3et3F5/gkEHKIw==",
         "dependencies": {
           "Castle.Core": "5.1.1"
         }