diff --git a/scripts/install b/scripts/install
index 7a46b92..845519b 100644
--- a/scripts/install
+++ b/scripts/install
@@ -103,6 +103,7 @@ ynh_script_progression --message="Configuring log rotation..."
 # Use logrotate to manage application logfile(s)
 touch "$final_path/data/log.txt"
 ynh_use_logrotate "$final_path/data/log.txt"
+chown $app:www-data "$final_path/data/log.txt"
 
 #=================================================
 # MODIFY A CONFIG FILE
diff --git a/scripts/upgrade b/scripts/upgrade
index 3502733..cdb65b4 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -135,6 +135,7 @@ then
     ynh_secure_remove "$final_path/data/log.txt"
     touch "$final_path/data/log.txt"
 fi
+chown $app:www-data "$final_path/data/log.txt"
 
 ynh_use_logrotate --non-append