diff --git a/CHANGES.md b/CHANGES.md
index 032dd8c..6adae4a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -8,7 +8,7 @@ npx auto-changelog -l false --hide-empty-releases  -v v1.3.1 -o CHANGES.out.md
 ``` 
 -->
 
-## [1.3.1] - (unreleased)
+## [1.3.1] - 2023-09-26
 
 ### Changed
 
diff --git a/antareslauncher/__init__.py b/antareslauncher/__init__.py
index 227a2db..250662a 100644
--- a/antareslauncher/__init__.py
+++ b/antareslauncher/__init__.py
@@ -11,7 +11,7 @@
 
 __version__ = "1.3.1"
 __author__ = "RTE, Antares Web Team"
-__date__ = "(unreleased)"
+__date__ = "2023-09-26"
 # noinspection SpellCheckingInspection
 __credits__ = "(c) Réseau de Transport de l’Électricité (RTE)"