diff --git a/esphome/const.py b/esphome/const.py
index 8f4cfcbf6c..bfd1e2ec6b 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -2,10 +2,10 @@
 
 MAJOR_VERSION = 1
 MINOR_VERSION = 12
-PATCH_VERSION = '0b3'
+PATCH_VERSION = '0b4'
 __short_version__ = '{}.{}'.format(MAJOR_VERSION, MINOR_VERSION)
 __version__ = '{}.{}'.format(__short_version__, PATCH_VERSION)
-ESPHOME_CORE_VERSION = '1.12.0b3'
+ESPHOME_CORE_VERSION = '1.12.0b4'
 
 ESP_PLATFORM_ESP32 = 'ESP32'
 ESP_PLATFORM_ESP8266 = 'ESP8266'