diff --git a/components/showcase_component/__init__.py b/components/showcase_component/__init__.py
index 26613e1..bae67fa 100644
--- a/components/showcase_component/__init__.py
+++ b/components/showcase_component/__init__.py
@@ -14,8 +14,8 @@ CONFIG_SCHEMA = cv.Schema(
     {
         cv.GenerateID(): cv.declare_id(ShowcaseComponent),
 
-        cv.Required(CONF_UPPER): cv.use_id(output.FloatOutput),
-        cv.Required(CONF_LOWER): cv.use_id(output.FloatOutput)
+        cv.Required("upper"): cv.use_id(output.FloatOutput),
+        cv.Required("lower"): cv.use_id(output.FloatOutput)
     }
 ).extend(cv.COMPONENT_SCHEMA).extend(i2c.i2c_device_schema(CONF_I2C_ADDR))