diff --git a/HISTORY.rst b/HISTORY.rst
index 6ee3b220..be668065 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -4,7 +4,7 @@ Release Notes
 PlatformIO 2.0
 --------------
 
-2.9.4 (2016-06-??)
+2.9.4 (2016-06-04)
 ~~~~~~~~~~~~~~~~~~
 
 * Show ``udev`` warning only for the Linux OS while upload firmware
diff --git a/platformio/__init__.py b/platformio/__init__.py
index 9e984cea..e470d028 100644
--- a/platformio/__init__.py
+++ b/platformio/__init__.py
@@ -14,7 +14,7 @@
 
 import sys
 
-VERSION = (2, 9, 3)
+VERSION = (2, 9, 4)
 __version__ = ".".join([str(s) for s in VERSION])
 
 __title__ = "platformio"