diff --git a/src/Orc.Serialization.Json.Tests/Orc.Serialization.Json.Tests.csproj b/src/Orc.Serialization.Json.Tests/Orc.Serialization.Json.Tests.csproj
index 76a5284..6378401 100644
--- a/src/Orc.Serialization.Json.Tests/Orc.Serialization.Json.Tests.csproj
+++ b/src/Orc.Serialization.Json.Tests/Orc.Serialization.Json.Tests.csproj
@@ -21,7 +21,7 @@
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-    <PackageReference Include="NUnit" Version="4.6.1" PrivateAssets="all" />
+    <PackageReference Include="NUnit" Version="5.0.0" PrivateAssets="all" />
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diff --git a/src/Orc.Serialization.Json.Tests/packages.lock.json b/src/Orc.Serialization.Json.Tests/packages.lock.json
index e53a5e1..08f5bf5 100644
--- a/src/Orc.Serialization.Json.Tests/packages.lock.json
+++ b/src/Orc.Serialization.Json.Tests/packages.lock.json
@@ -71,9 +71,9 @@
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       "NUnit.Analyzers": {
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