diff --git a/src/backend/core/tests/utils/test_webhooks_matrix_client.py b/src/backend/core/tests/utils/test_webhooks_matrix_client.py
index 4ad66b2..e29797c 100644
--- a/src/backend/core/tests/utils/test_webhooks_matrix_client.py
+++ b/src/backend/core/tests/utils/test_webhooks_matrix_client.py
@@ -131,7 +131,7 @@ def test_matrix_webhook__invite_user_to_room_success(caplog):
 
 
 @responses.activate
-@override_settings(TCHAP_ACCESS_TOKEN="TCHAP_TOKEN")
+@override_settings(MATRIX_BOT_ACCESS_TOKEN="TCHAP_TOKEN")
 def test_matrix_webhook__override_secret_for_tchap():
     """The user passed to the function should get invited."""
     user = factories.UserFactory()
diff --git a/src/backend/core/utils/matrix.py b/src/backend/core/utils/matrix.py
index 96d0865..976127d 100644
--- a/src/backend/core/utils/matrix.py
+++ b/src/backend/core/utils/matrix.py
@@ -28,14 +28,12 @@ session.mount("https://", adapter)
 
 class MatrixAPIClient:
     """A client to interact with Matrix API"""
-
-    secret = settings.TCHAP_ACCESS_TOKEN
-
+    
     def get_headers(self, webhook):
         """Build header dict from webhook object."""
         headers = {"Content-Type": "application/json"}
         if "tchap.gouv.fr" in webhook.url:
-            token = settings.TCHAP_ACCESS_TOKEN
+            token = settings.MATRIX_BOT_ACCESS_TOKEN
         elif webhook.secret:
             token = webhook.secret
         else:
diff --git a/src/backend/people/settings.py b/src/backend/people/settings.py
index 4e750d8..36267fb 100755
--- a/src/backend/people/settings.py
+++ b/src/backend/people/settings.py
@@ -601,9 +601,9 @@ class Base(Configuration):
         environ_name="DNS_PROVISIONING_API_CREDENTIALS",
         environ_prefix=None,
     )
-    TCHAP_ACCESS_TOKEN = values.Value(
+    MATRIX_BOT_ACCESS_TOKEN = values.Value(
         default=None,
-        environ_name="TCHAP_ACCESS_TOKEN",
+        environ_name="MATRIX_BOT_ACCESS_TOKEN",
         environ_prefix=None,
     )
 
diff --git a/src/helm/env.d/dev/values.desk.yaml.gotmpl b/src/helm/env.d/dev/values.desk.yaml.gotmpl
index 47ecf0e..8154c3c 100644
--- a/src/helm/env.d/dev/values.desk.yaml.gotmpl
+++ b/src/helm/env.d/dev/values.desk.yaml.gotmpl
@@ -73,7 +73,7 @@ backend:
       secretKeyRef:
         name: backend
         key: MAIL_PROVISIONING_API_CREDENTIALS
-    TCHAP_ACCESS_TOKEN: service_account_key
+    MATRIX_BOT_ACCESS_TOKEN: service_account_key
   command:
     - "gunicorn"
     - "-c"