diff --git a/CHANGES.md b/CHANGES.md
index dd9ae4f..0d68d50 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,10 @@
+# 0.10 (wip)
+
+- breaking: manual spans now take a `explicit_span_ctx` as parent, that
+    can potentially be transmitted across processes/machines. It also
+    is intended to be more compatible with OTEL.
+- depopt on unix for TEF timestamps
+
 # 0.9.1