diff --git a/homeassistant/components/conversation/services.yaml b/homeassistant/components/conversation/services.yaml
index 8ac929e13b6..1a28044dcb5 100644
--- a/homeassistant/components/conversation/services.yaml
+++ b/homeassistant/components/conversation/services.yaml
@@ -7,6 +7,7 @@ process:
       name: Text
       description: Transcribed text
       example: Turn all lights on
+      required: true
       selector:
         text:
     language: