diff --git a/MessagePack.NodaTime.Tests/MessagePack.NodaTime.Tests.csproj b/MessagePack.NodaTime.Tests/MessagePack.NodaTime.Tests.csproj
index 850d073..ea1fc08 100644
--- a/MessagePack.NodaTime.Tests/MessagePack.NodaTime.Tests.csproj
+++ b/MessagePack.NodaTime.Tests/MessagePack.NodaTime.Tests.csproj
@@ -18,7 +18,7 @@
2.6.4
- 2.5.4
+ 2.5.6
runtime; build; native; contentfiles; analyzers; buildtransitive
all