diff --git a/.prev-version b/.prev-version
index 4a788a01..0f44168a 100644
--- a/.prev-version
+++ b/.prev-version
@@ -1 +1 @@
-3.6.3
+3.6.4
diff --git a/NEWS b/NEWS
index 919ff387..01f804d3 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,8 @@
 GNU Bison NEWS
 
+* Noteworthy changes in release ?.? (????-??-??) [?]
+
+
 * Noteworthy changes in release 3.6.4 (2020-06-15) [stable]
 
 ** Bug fixes