diff --git a/CHANGES b/CHANGES
index f014c03..55db504 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,10 @@
+Heptagon 1.04.00 (29/09/2017)
+-----------------------------
+
+ - Lustre front-end (experimental) : syntax adaptations to parse Lustre programs
+ - Bug fix in normalization of merge
+ - Compatibility with reatk >= 0.11
+
 Heptagon 1.03.04 (24/05/2017)
 -----------------------------
 
diff --git a/Makefile-distrib b/Makefile-distrib
index 24f07d9..3ee7805 100644
--- a/Makefile-distrib
+++ b/Makefile-distrib
@@ -2,7 +2,7 @@
 include config
 
 #version = $(shell date +"%d%m%y")
-version = 1.03.04
+version = 1.04.00
 osname=$(shell uname -s)
 hardware=$(shell uname -m)
 heptdir = heptagon-$(version)
diff --git a/compiler/utilities/global/compiler_options.ml b/compiler/utilities/global/compiler_options.ml
index 08b5c8c..d677dc2 100644
--- a/compiler/utilities/global/compiler_options.ml
+++ b/compiler/utilities/global/compiler_options.ml
@@ -32,7 +32,7 @@
 open Names
 
 (* version of the compiler *)
-let version = "1.03.04"
+let version = "1.04.00"
 let date = "DATE"
 
 (* standard module *)