diff --git a/backend/resources/hacknight.py b/backend/resources/hacknight.py
index f3d25d1f..3a532876 100644
--- a/backend/resources/hacknight.py
+++ b/backend/resources/hacknight.py
@@ -91,13 +91,13 @@ def delete(self, id):
         hacknight = Hacknight.query.get_or_404(id)
         participants = {participant.id for participant in hacknight.participants}
         json_data = request.get_json(force=True)
-        ids_schema = Schema.from_dict({"participant_ids": fields.List(fields.Int())})
+        ids_schema = Schema.from_dict({"participants_ids": fields.List(fields.Int())})
         try:
             data = ids_schema().load(json_data)
         except ValidationError as err:
             return err.messages, HTTPStatus.UNPROCESSABLE_ENTITY
 
-        to_remove = participants.intersection(set(data["participant_ids"]))
+        to_remove = participants.intersection(set(data["participants_ids"]))
         if not to_remove:
             return {"message": "No participant to delete"}, HTTPStatus.BAD_REQUEST
         hacknight.participants = [
diff --git a/frontend/src/store/modules/hacknight.js b/frontend/src/store/modules/hacknight.js
index c7471d1e..9684d838 100644
--- a/frontend/src/store/modules/hacknight.js
+++ b/frontend/src/store/modules/hacknight.js
@@ -77,11 +77,11 @@ export default {
           commit('raiseError', error);
         });
     },
-    deleteParticipants({ commit, getters }, participant_ids) {
+    deleteParticipants({ commit, getters }, participants_ids) {
       axios
         .delete(`/api/hacknights/${getters.getHacknight.id}/participants/`, {
           data: {
-            participant_ids: participant_ids
+            participants_ids: participants_ids
           }
         })
         .then(res => {