diff --git a/action.yml b/action.yml
index 0293c86..76226bb 100644
--- a/action.yml
+++ b/action.yml
@@ -38,7 +38,7 @@ inputs:
     description: 'Custom API endpoint of LanguageTool server. e.g. https://languagetool.org/api'
     default: ''
   wait_server_startup_duration:
-    description: 'Wait the startup of the server'
+    description: 'Wait the startup of the server.'
     default: '3'
 runs:
   using: 'docker'