diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index 1ad566bcb..1e6ac3a82 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -542,7 +542,6 @@ def app_upgrade(auth, app=[], url=None, file=None):
 
     """
     from yunohost.hook import hook_add, hook_remove, hook_exec, hook_callback
-    from yunohost.log import Journal
 
     # Retrieve interface
     is_api = msettings.get('interface') == 'api'
diff --git a/src/yunohost/hook.py b/src/yunohost/hook.py
index 95025d827..89defe55e 100644
--- a/src/yunohost/hook.py
+++ b/src/yunohost/hook.py
@@ -359,6 +359,12 @@ def hook_exec(path, args=None, raise_on_error=False, no_trace=False,
     else:
         logger.info(m18n.n('executing_script', script=path))
 
+    # Define output callbacks and call command
+    callbacks = (
+        lambda l: logger.info(l.rstrip()),
+        lambda l: logger.warning(l.rstrip()),
+    )
+
     returncode = call_async_output(
         command, callbacks, shell=False, cwd=chdir
     )