diff --git a/.changes/v3.9.1.md b/.changes/v3.9.1.md
new file mode 100644
index 000000000..546f55b74
--- /dev/null
+++ b/.changes/v3.9.1.md
@@ -0,0 +1,3 @@
+## v3.9.1 - 2025-02-27
+### Fixed
+* Fix post/patch request with missing 'type' property for gender   
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 477d99c11..8c3a94254 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html),
 and is generated by [Changie](https://github.com/miniscruff/changie).
 
 
+## v3.9.1 - 2025-02-27
+### Fixed
+* Fix post/patch request with missing 'type' property for gender   
+
 ## v3.9.0 - 2025-02-27
 ### Feature
 * ([#349](https://gitlab.com/Chill-Projet/chill-bundles/-/issues/349)) Suggest all referrers within actions of the accompanying period when creating an activity   
diff --git a/src/Bundle/ChillMainBundle/Serializer/Normalizer/GenderDocGenNormalizer.php b/src/Bundle/ChillMainBundle/Serializer/Normalizer/GenderDocGenNormalizer.php
index 7361c7b96..fee232ddc 100644
--- a/src/Bundle/ChillMainBundle/Serializer/Normalizer/GenderDocGenNormalizer.php
+++ b/src/Bundle/ChillMainBundle/Serializer/Normalizer/GenderDocGenNormalizer.php
@@ -34,7 +34,7 @@ class GenderDocGenNormalizer implements ContextAwareNormalizerInterface, Normali
             'id' => $gender->getId(),
             'label' => $this->translatableStringHelper->localize($gender->getLabel()),
             'genderTranslation' => $gender->getGenderTranslation(),
-            'type' => 'chill_main_gender'
+            'type' => 'chill_main_gender',
         ];
     }
 }