diff --git a/homeassistant/components/tplink/strings.json b/homeassistant/components/tplink/strings.json
index a7f9dfbcb09..70eff4a34c4 100644
--- a/homeassistant/components/tplink/strings.json
+++ b/homeassistant/components/tplink/strings.json
@@ -30,8 +30,8 @@
           "password": "[%key:common::config_flow::data::password%]"
         },
         "data_description": {
-          "username": "Your TP-Link cloud username which is the full email and is case sensitive.",
-          "password": "Your TP-Link cloud password which is case sensitive."
+          "username": "Your TP-Link cloud username which is the full email and is case-sensitive.",
+          "password": "Your TP-Link cloud password which is case-sensitive."
         }
       },
       "discovery_auth_confirm": {