diff --git a/.prev-version b/.prev-version
index e55b56f5..d1aca36c 100644
--- a/.prev-version
+++ b/.prev-version
@@ -1 +1 @@
-3.1.90
+3.1.91
diff --git a/NEWS b/NEWS
index 7bc6e056..d4dd7619 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,8 @@
 GNU Bison NEWS
 
+* Noteworthy changes in release ?.? (????-??-??) [?]
+
+
 * Noteworthy changes in release 3.1.91 (2018-10-18) [beta]
 
 ** Bug fixes