diff --git a/HISTORY.rst b/HISTORY.rst
index 935f1322..fb17416e 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -13,7 +13,7 @@ PlatformIO 4.0
 PlatformIO 3.0
 --------------
 
-3.6.6 (2019-??-??)
+3.6.6 (2019-03-29)
 ~~~~~~~~~~~~~~~~~~
 
 * Project Generator: fixed a warning "Property !!! WARNING !!! is not allowed" for VSCode
diff --git a/docs b/docs
index 1ed66f3c..3a6c69a1 160000
--- a/docs
+++ b/docs
@@ -1 +1 @@
-Subproject commit 1ed66f3cc6cc3a31f6eaf77e1db9a0ab55062ded
+Subproject commit 3a6c69a1ae227479321de75184aa8678104fc37f