diff --git a/src/submodules/MessagePack-CSharp b/src/submodules/MessagePack-CSharp
index 8861abdde93a..66ff4086d168 160000
--- a/src/submodules/MessagePack-CSharp
+++ b/src/submodules/MessagePack-CSharp
@@ -1 +1 @@
-Subproject commit 8861abdde93a3b97180ac3b2eafa33459ad52392
+Subproject commit 66ff4086d16826e559fe77f7612716088fa1a514