diff --git a/helpers/config.py b/helpers/config.py
index 313b9d6..25089db 100644
--- a/helpers/config.py
+++ b/helpers/config.py
@@ -32,7 +32,7 @@ class Config(with_metaclass(Singleton)):
     DEFAULT_PROXY_PORT = "8080"
     DEFAULT_NGINX_PORT = "80"
     DEFAULT_NGINX_HTTPS_PORT = "443"
-    KOBO_DOCKER_BRANCH = '2.020.39'
+    KOBO_DOCKER_BRANCH = '2.020.40a'
     KOBO_INSTALL_VERSION = '3.2.1'
 
     def __init__(self):