diff --git a/.buildinfo b/.buildinfo
index 5a625584..81226eb1 100644
--- a/.buildinfo
+++ b/.buildinfo
@@ -1,4 +1,4 @@
# Sphinx build info version 1
# This file hashes the configuration used when building these files. When it is not found, a full rebuild will be done.
-config: 74e717e82fceb1071547d4a0bb77aaf2
+config: 2aa72cf8ef85b2bc025ca3e9df7bf3a7
tags: 645f666f9bcd5a90fca523b33c5a78b7
diff --git a/_static/documentation_options.js b/_static/documentation_options.js
index 99fa39d0..87643e23 100644
--- a/_static/documentation_options.js
+++ b/_static/documentation_options.js
@@ -1,6 +1,6 @@
var DOCUMENTATION_OPTIONS = {
URL_ROOT: document.getElementById("documentation_options").getAttribute('data-url_root'),
- VERSION: '1.21.1.dev2',
+ VERSION: '1.21.1.dev4',
LANGUAGE: 'en',
COLLAPSE_INDEX: false,
BUILDER: 'html',
diff --git a/architecture.html b/architecture.html
index f7312b4e..48e8bacf 100644
--- a/architecture.html
+++ b/architecture.html
@@ -3,7 +3,7 @@