diff --git a/go.mod b/go.mod
index 9ca01e7..b5de1a3 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	golang.org/x/sync v0.8.0
 )
 
-require github.com/creachadair/mds v0.17.1
+require github.com/creachadair/mds v0.20.0
 
 go 1.22
 
diff --git a/go.sum b/go.sum
index b3db5f5..5a6c382 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-github.com/creachadair/mds v0.17.1 h1:lXQbTGKmb3nE3aK6OEp29L1gCx6B5ynzlQ6c1KOBurc=
-github.com/creachadair/mds v0.17.1/go.mod h1:4b//mUiL8YldH6TImXjmW45myzTLNS1LLjOmrk888eg=
+github.com/creachadair/mds v0.20.0 h1:bXQO154c2TDgCY+rRmdIfUqjeqGYejmZ/QayeTNwbp8=
+github.com/creachadair/mds v0.20.0/go.mod h1:4b//mUiL8YldH6TImXjmW45myzTLNS1LLjOmrk888eg=
 github.com/fortytw2/leaktest v1.3.0 h1:u8491cBMTQ8ft8aeV+adlcytMZylmA5nnwwkRZjI8vw=
 github.com/fortytw2/leaktest v1.3.0/go.mod h1:jDsjWgpAGjm2CA7WthBh/CdZYEPF31XHquHwclZch5g=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=