diff --git a/device-types/Furukawa/BT144.yaml b/device-types/Furukawa/BT144.yaml
index 29f9a17e4..840d2caed 100644
--- a/device-types/Furukawa/BT144.yaml
+++ b/device-types/Furukawa/BT144.yaml
@@ -1,3 +1,4 @@
+---
 manufacturer: Furukawa
 model: BT144
 slug: furukawa-bt144
diff --git a/device-types/Furukawa/BT36.yaml b/device-types/Furukawa/BT36.yaml
index fc9f99749..beab94aff 100644
--- a/device-types/Furukawa/BT36.yaml
+++ b/device-types/Furukawa/BT36.yaml
@@ -1,3 +1,4 @@
+---
 manufacturer: Furukawa
 model: BT36
 slug: furukawa-bt36
diff --git a/device-types/Furukawa/BT48.yaml b/device-types/Furukawa/BT48.yaml
index 1d8e89377..9d8d433e6 100644
--- a/device-types/Furukawa/BT48.yaml
+++ b/device-types/Furukawa/BT48.yaml
@@ -1,3 +1,4 @@
+---
 manufacturer: Furukawa
 model: BT48
 slug: furukawa-bt48
diff --git a/device-types/Furukawa/BT72.yaml b/device-types/Furukawa/BT72.yaml
index 8f29b2721..995eabad4 100644
--- a/device-types/Furukawa/BT72.yaml
+++ b/device-types/Furukawa/BT72.yaml
@@ -1,3 +1,4 @@
+---
 manufacturer: Furukawa
 model: BT72
 slug: furukawa-bt72