reorganize a bunch of things related to the x509certificate interface
diff --git a/docs/index.rst b/docs/index.rst
index e64f567..35f80a2 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -62,8 +62,8 @@
 .. toctree::
     :maxdepth: 2
 
-    x509
     fernet
+    x509
     random-numbers
     exceptions
     faq