diff --git a/HISTORY.rst b/HISTORY.rst
index d896f7e3..65a57d1c 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -1,6 +1,8 @@
 Release Notes
 =============
 
+.. _release_notes_4_0:
+
 PlatformIO 4.0
 --------------
 
diff --git a/docs b/docs
index 56a4c2ac..6affd345 160000
--- a/docs
+++ b/docs
@@ -1 +1 @@
-Subproject commit 56a4c2ac24d59218ea29ba03ee7f413ee3d541d8
+Subproject commit 6affd34531e3dda49729d9f6239241229f43267f