diff --git a/docs/usage/cards/card_binary_sensor.md b/docs/usage/cards/card_binary_sensor.md
index 8dac0aa4c..4079ee9be 100644
--- a/docs/usage/cards/card_binary_sensor.md
+++ b/docs/usage/cards/card_binary_sensor.md
@@ -30,6 +30,14 @@ The `binary-sensor-card` is to show the state (on/off, open/close, etc.) of a bi
       ulm_show_last_changed: true
     ```
 
+!!! Warning "⚠️ Breaking Change `v1.3.8`"
+
+    `ulm_show_last_changed` is renamed to `ulm_card_binary_sensor_show_last_changed`:
+    ```yaml
+    variables:
+      ulm_card_binary_sensor_show_last_changed: true
+    ```
+
 ## Usage
 
 ```yaml
@@ -37,7 +45,7 @@ The `binary-sensor-card` is to show the state (on/off, open/close, etc.) of a bi
   template: card_binary_sensor
   variables:
     ulm_card_binary_sensor_alert: true
-    ulm_show_last_changed: true
+    ulm_card_binary_sensor_show_last_changed: true
   entity: binary_sensor.garage_door
 ```
 
diff --git a/docs/usage/cards/card_binary_sensor_alert.md b/docs/usage/cards/card_binary_sensor_alert.md
index 6879344ff..302c5b39c 100644
--- a/docs/usage/cards/card_binary_sensor_alert.md
+++ b/docs/usage/cards/card_binary_sensor_alert.md
@@ -30,6 +30,13 @@ The `binary-sensor-card` is to show the state (on/off, open/close, etc.) of a bi
     variables:
       ulm_show_last_changed: true
     ```
+!!! Warning "⚠️ Breaking Change `v1.3.8`"
+
+    `ulm_show_last_changed` is renamed to `ulm_card_binary_sensor_show_last_changed`:
+    ```yaml
+    variables:
+      ulm_card_binary_sensor_show_last_changed: true
+    ```
 
 ## Usage
 
@@ -38,7 +45,7 @@ The `binary-sensor-card` is to show the state (on/off, open/close, etc.) of a bi
   template: card_binary_sensor_alert
   variables:
     ulm_card_binary_sensor_alert: true
-    ulm_show_last_changed: true
+    ulm_card_binary_sensor_show_last_changed: true
   entity: binary_sensor.garage_door
 ```