diff --git a/Serialization.md b/Serialization.md
index 0f36f54..3288ba4 100644
--- a/Serialization.md
+++ b/Serialization.md
@@ -44,6 +44,8 @@ There's an experimental Rust crate for reading and writing STEP files, called [r
 
 ### SolveSpace
 
+It might be useful to look at the SolveSpace file format (.slvs), with the caveat that there's an ongoing effort to [replace](https://github.com/solvespace/solvespace/issues/75) it.
+
 None of the SolveSpace [export options](https://solvespace.com/ref.pl#Export) talk about preserving constraint information.
 
 ## Rust frameworks