diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc8dec1a1..9c7821987 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ and this project adheres to
 
 <!-- write down unreleased development here -->
 
+* [activity] Bugfix: documents can now be added to an activity.
 * [tasks] improve tasks with filter order
 * [tasks] refactor singleControllerTasks: limit the number of conditions from the context
 * [validations] validation of accompanying period added: no duplicate participations or resources (https://gitlab.com/champs-libres/departement-de-la-vendee/accent-suivi-developpement/-/issues/60).
@@ -22,6 +23,7 @@ and this project adheres to
 * [activity]: perform client-side validation & show/hide fields in the "new location" modal
 * [admin]: links to activity admin section added again.
 
+
 ## Test releases
 
 ### Test release 2021-10-27
diff --git a/src/Bundle/ChillActivityBundle/Entity/Activity.php b/src/Bundle/ChillActivityBundle/Entity/Activity.php
index ae310f775..e25448f10 100644
--- a/src/Bundle/ChillActivityBundle/Entity/Activity.php
+++ b/src/Bundle/ChillActivityBundle/Entity/Activity.php
@@ -158,7 +158,7 @@ class Activity implements HasCenterInterface, HasScopeInterface, AccompanyingPer
     private ?Collection $thirdParties = null;
 
     /**
-     * @ORM\ManyToMany(targetEntity="Chill\DocStoreBundle\Entity\StoredObject")
+     * @ORM\ManyToMany(targetEntity="Chill\DocStoreBundle\Entity\StoredObject", cascade={"persist"})
      */
     private Collection $documents;