diff --git a/mcu-basement-2.yaml b/mcu-basement-2.yaml
index 12d02b1..2cf8e07 100644
--- a/mcu-basement-2.yaml
+++ b/mcu-basement-2.yaml
@@ -22,6 +22,7 @@ esphome:
 
 esp8266:
   board: esp01_1m
+  toolchain: arduino
 
 packages:
   common: !include common/common_esp8266.yaml
diff --git a/mcu-basement.yaml b/mcu-basement.yaml
index d301aab..f4d966c 100644
--- a/mcu-basement.yaml
+++ b/mcu-basement.yaml
@@ -21,6 +21,7 @@ esphome:
 
 esp8266:
   board: esp01_1m
+  toolchain: arduino
 
 packages:
   common: !include common/common_esp8266.yaml
diff --git a/mcu-rf433.yaml b/mcu-rf433.yaml
index c09a86a..7e2a2ba 100644
--- a/mcu-rf433.yaml
+++ b/mcu-rf433.yaml
@@ -18,6 +18,7 @@ esphome:
 
 esp8266:
   board: esp01_1m
+  toolchain: arduino
 
 packages:
   common: !include common/common_esp8266.yaml
diff --git a/mcu-socket-01.yaml b/mcu-socket-01.yaml
index c471a9d..bd5bed9 100644
--- a/mcu-socket-01.yaml
+++ b/mcu-socket-01.yaml
@@ -26,6 +26,7 @@ esphome:
 
 esp8266:
   board: esp01_1m
+  toolchain: arduino
 
 packages:
   common: !include common/common_esp8266.yaml
diff --git a/mcu-socket-02.yaml b/mcu-socket-02.yaml
index d93b2f3..112b3a3 100644
--- a/mcu-socket-02.yaml
+++ b/mcu-socket-02.yaml
@@ -26,6 +26,7 @@ esphome:
 
 esp8266:
   board: esp01_1m
+  toolchain: arduino
 
 packages:
   common: !include common/common_esp8266.yaml
diff --git a/mcu-socket-03.yaml b/mcu-socket-03.yaml
index f7c46b4..8e67a5a 100644
--- a/mcu-socket-03.yaml
+++ b/mcu-socket-03.yaml
@@ -30,8 +30,10 @@ esphome:
   friendly_name: ${name}
   area: ${area}
   comment: ${comment}
+
 esp8266:
   board: esp01_1m
+  toolchain: arduino
 
 packages:
   common: !include common/common_esp8266.yaml
diff --git a/mcu-staircase-light.yaml b/mcu-staircase-light.yaml
index e3f17aa..a8a181b 100644
--- a/mcu-staircase-light.yaml
+++ b/mcu-staircase-light.yaml
@@ -17,6 +17,7 @@ esphome:
 
 esp8266:
   board: esp01_1m
+  toolchain: arduino
 
 packages:
   common: !include common/common_esp8266.yaml
diff --git a/mcu-tv-light.yaml b/mcu-tv-light.yaml
index 04e130d..60432d2 100644
--- a/mcu-tv-light.yaml
+++ b/mcu-tv-light.yaml
@@ -31,6 +31,7 @@ esphome:
 
 esp8266:
   board: esp8285
+  toolchain: arduino
 
 packages:
   common: !include common/common_esp8266.yaml
diff --git a/mcu-waterproof-socket.yaml b/mcu-waterproof-socket.yaml
index 78e8faf..4ba18dc 100644
--- a/mcu-waterproof-socket.yaml
+++ b/mcu-waterproof-socket.yaml
@@ -20,6 +20,7 @@ esphome:
 
 esp8266:
   board: esp01_1m
+  toolchain: arduino
 
 packages:
   common: !include common/common_esp8266.yaml