diff --git a/CHANGELOG b/CHANGELOG
index d9a81786..07c55c00 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,15 @@
 <h1>CHANGELOG</h1>
 
+<h3>1.31.0 (30/08/2024)</h3>
+<ul>
+  <li>Upgrade GEMSEO generated code to GEMSEO 5.x</li>
+  <li>Generate GEMSEO code in package layout mode</li>
+  <li>Use ruff 0.6 as code formatter</li>
+  <li>Fix sub-optimization code generation</li>
+  <li>Manage sub-optimization discipline in json format</li>
+  <li>Upgrade javascript frontend dependencies</li>
+</ul>
+
 <h3>1.30.3 (21/08/2024)</h3>
 <ul>
   <li>[Tech] Upgrade backend to rails 7.2, pagy 9.0, shakapacker 9.0</li>
@@ -735,4 +745,4 @@
   <li>Display and import Multi Disciplinary Analyses from CICAV Excel template file</li>
   <li>Display Notebooks as static HTML</li>
   <li>Link to JupyterHub server</li>
-</ul>
+</ul>
\ No newline at end of file
diff --git a/VERSION b/VERSION
index 593d7210..34aae156 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.30.4
+1.31.0