diff --git a/changelog.md b/changelog.md
index b9cbd6f..afb5332 100644
--- a/changelog.md
+++ b/changelog.md
@@ -79,4 +79,5 @@
 - Page layout
 
 #### Fix
-- Card
\ No newline at end of file
+- Card
+- Deleting activities does not delete task
\ No newline at end of file
diff --git a/config/packages/mapping/TaskEntity.orm.xml b/config/packages/mapping/TaskEntity.orm.xml
index a4a58f5..1833cf3 100644
--- a/config/packages/mapping/TaskEntity.orm.xml
+++ b/config/packages/mapping/TaskEntity.orm.xml
@@ -8,7 +8,7 @@
 			<join-column name="actor" referenced-column-name="id" on-delete="SET NULL"/>
 		</many-to-one>
 		<many-to-one field="activity" target-entity="ActivityEntity" nullable="true">
-			<join-column name="activity" referenced-column-name="id" on-delete="SET NULL"/>
+			<join-column name="activity" referenced-column-name="id" on-delete="CASCADE"/>
 		</many-to-one>
 		<field name="status" type="string" column="status" length="256"/>
 	</entity>