diff --git a/CHANGES b/CHANGES
index 3c011941..d7967e45 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,9 @@
+===== 4.1.0 =====
+* Compatibility with WASM
+
+===== 4.0.0 =====
+* Compatibility with Ocsigen Server 6
+
 ===== 2.8.0 (2020-07-28) =====
 
 * rework Ot_page_transition
diff --git a/opam b/opam
index 5854f032..9f380b33 100644
--- a/opam
+++ b/opam
@@ -1,6 +1,6 @@
 opam-version: "2.0"
 name: "ocsigen-toolkit"
-version: "4.0.0"
+version: "4.1.0"
 maintainer: "dev@ocsigen.org"
 synopsis: "Reusable UI components for Eliom applications (client only, or client-server)"
 description: "The Ocsigen Toolkit is a set of user interface widgets that facilitate the development of Eliom applications."