diff --git a/docs/index.rst b/docs/index.rst
index 918b43a..e64f567 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -62,12 +62,12 @@
 .. toctree::
     :maxdepth: 2
 
+    x509
     fernet
     random-numbers
     exceptions
     faq
     glossary
-    x509
 
 The hazardous materials layer
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~