diff --git a/esphomeyaml/const.py b/esphomeyaml/const.py
index 5e0b0c1c1a..bd622fdc24 100644
--- a/esphomeyaml/const.py
+++ b/esphomeyaml/const.py
@@ -2,10 +2,10 @@
 
 MAJOR_VERSION = 1
 MINOR_VERSION = 9
-PATCH_VERSION = '0b3'
+PATCH_VERSION = '0b4'
 __short_version__ = '{}.{}'.format(MAJOR_VERSION, MINOR_VERSION)
 __version__ = '{}.{}'.format(__short_version__, PATCH_VERSION)
-ESPHOMELIB_VERSION = '1.9.0b3'
+ESPHOMELIB_VERSION = '1.9.0b4'
 
 ESP_PLATFORM_ESP32 = 'ESP32'
 ESP_PLATFORM_ESP8266 = 'ESP8266'