diff --git a/go.mod b/go.mod
index d84ea7d..44b5847 100644
--- a/go.mod
+++ b/go.mod
@@ -6,4 +6,4 @@ toolchain go1.21.2
 
 require github.com/google/go-cmp v0.6.0
 
-require github.com/creachadair/mds v0.8.2
+require github.com/creachadair/mds v0.10.4
diff --git a/go.sum b/go.sum
index 5ed75f1..2305a2a 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,4 @@
-github.com/creachadair/mds v0.8.2 h1:+Jvq8XBrREerXI/QZpNAeiLjIBuVMOl8p3v+mKgSexY=
-github.com/creachadair/mds v0.8.2/go.mod h1:4vrFYUzTXMJpMBU+OA292I6IUxKWCCfZkgXg+/kBZMo=
+github.com/creachadair/mds v0.10.4 h1:pYO7hGbXdgXGgTvgsRb8wC9Y0zJan7BQcHb3vqnQNIw=
+github.com/creachadair/mds v0.10.4/go.mod h1:4vrFYUzTXMJpMBU+OA292I6IUxKWCCfZkgXg+/kBZMo=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=