diff --git a/CHANGES b/CHANGES
index 62d26e2..877969d 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,8 @@
+6.4 (04/08/2021)
+----------------
+
+  * Add support for OCaml 4.13 (#89, Kate Deplaix)
+
 6.3 (18/11/2020)
 ----------------
 
diff --git a/dune-project b/dune-project
index 9927ad1..796ad90 100644
--- a/dune-project
+++ b/dune-project
@@ -1,3 +1,3 @@
 (lang dune 1.6)
 (name ppx_tools)
-(version 6.3)
+(version 6.4)