diff --git a/ChangeLog b/ChangeLog
index 56cdd0e..1899d21 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -206,3 +206,5 @@ Added option to print source information with -1 (#64). Thanks to Victor Cacciar
 (Version 2.8.8) -- June, 2020
 
 Fixed compilation on old compilers supported by TeX Live (#65). Thanks to Akira Kakuto and Hironobu Yamashita.
+
+(Version 2.8.9) -- UNRELEASED
diff --git a/Makefile b/Makefile
index 6b3d613..56de95b 100644
--- a/Makefile
+++ b/Makefile
@@ -105,7 +105,7 @@ SRC	= detex.l
 #
 D_OBJ	= detex.o
 
-VERSION = 2.8.8
+VERSION = 2.8.9-SNAPSHOT
 
 all:	${PROGS}
 
diff --git a/README b/README
index b04e403..57e4677 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-OpenDetex - Version 2.8.8
+OpenDetex - Version 2.8.9 UNRELEASED
 
 OpenDetex is a program to remove TeX constructs from a text file.  It recognizes
 the \input command.