diff --git a/Changelog b/Changelog
index 141ced448ff11999cd6e3c9571ffaa1b38f307ea..d97c6803349ab92c574e12009d63afb771bb8aa3 100644
--- a/Changelog
+++ b/Changelog
@@ -13,6 +13,11 @@
 # '#?nnn'  : OLD-BTS entry #nnn                                               #
 ###############################################################################
 
+##################################
+Open Source Release <next-release>
+##################################
+
+
 ################################
 Open Source Release 18.0 (Argon)
 ################################
diff --git a/VERSION b/VERSION
index fc004cb52c7a3c23ed19e8b19149b832f492ca2b..3a48ff126f4f03ea3b2eb133fb1b2de6bb40e772 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-18.0
\ No newline at end of file
+18.0+dev
\ No newline at end of file
diff --git a/tests/misc/oracle/debug_category.16.res.oracle b/tests/misc/oracle/debug_category.16.res.oracle
index 708cc59e04fa55dc3bb39458bb840dd6f145359b..75e2529443bacd2087a9202069d4eee278b6f201 100644
--- a/tests/misc/oracle/debug_category.16.res.oracle
+++ b/tests/misc/oracle/debug_category.16.res.oracle
@@ -9,7 +9,7 @@
   
   Plug-in test aborted: internal error.
   Please report as 'crash' at http://bts.frama-c.com/.
-  Your Frama-C version is 18.0 (Argon).
+  Your Frama-C version is 18.0+dev (Argon).
   Note that a version and a backtrace alone often do not contain enough
   information to understand the bug. Guidelines for reporting bugs are at:
   http://bts.frama-c.com/dokuwiki/doku.php?id=mantis:frama-c:bug_reporting_guidelines
diff --git a/tests/misc/oracle/log-file.1.res.oracle b/tests/misc/oracle/log-file.1.res.oracle
index f80564b48f8e005f479cfa2ebb10007902b71e17..a7ef0e3d8b8280aa5101209cf259ce5b9cc16375 100644
--- a/tests/misc/oracle/log-file.1.res.oracle
+++ b/tests/misc/oracle/log-file.1.res.oracle
@@ -14,7 +14,7 @@
   
   Frama-C aborted: internal error.
   Please report as 'crash' at http://bts.frama-c.com/.
-  Your Frama-C version is 18.0 (Argon).
+  Your Frama-C version is 18.0+dev (Argon).
   Note that a version and a backtrace alone often do not contain enough
   information to understand the bug. Guidelines for reporting bugs are at:
   http://bts.frama-c.com/dokuwiki/doku.php?id=mantis:frama-c:bug_reporting_guidelines
diff --git a/tests/misc/oracle/plugin-log-all.txt b/tests/misc/oracle/plugin-log-all.txt
index 1a773b13cb6c253a07b1204bddef249e3ba04f0e..2483f6ebcc8f221037ad68a82185c2ff62960064 100644
--- a/tests/misc/oracle/plugin-log-all.txt
+++ b/tests/misc/oracle/plugin-log-all.txt
@@ -14,7 +14,7 @@ The full backtrace is:
 
 Frama-C aborted: internal error.
 Please report as 'crash' at http://bts.frama-c.com/.
-Your Frama-C version is 18.0 (Argon).
+Your Frama-C version is 18.0+dev (Argon).
 Note that a version and a backtrace alone often do not contain enough
 information to understand the bug. Guidelines for reporting bugs are at:
 http://bts.frama-c.com/dokuwiki/doku.php?id=mantis:frama-c:bug_reporting_guidelines