diff --git a/.prev-version b/.prev-version
index 3abad8fc..63f35d33 100644
--- a/.prev-version
+++ b/.prev-version
@@ -1 +1 @@
-3.3.90
+3.3.91
diff --git a/NEWS b/NEWS
index 1315ca1d..6cdf314d 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,8 @@
 GNU Bison NEWS
 
+* Noteworthy changes in release ?.? (????-??-??) [?]
+
+
 * Noteworthy changes in release 3.3.91 (2019-05-12) [beta]
 
 ** Bug fixes