diff --git a/unity-project/action.yaml b/unity-project/action.yaml
index 6c87be6..7d2c8e5 100644
--- a/unity-project/action.yaml
+++ b/unity-project/action.yaml
@@ -9,7 +9,7 @@ inputs:
     description: "Unity Platform. Options: windows, windows32bit, mac, linux, android"
     required: true
   serial:
-    description: "Unity license serial number."
+    description: "Unity license serial number. Or 'public' for a public license."
     required: true
     default: public
   email:
diff --git a/unity/action.yaml b/unity/action.yaml
index 98748ee..2cdbf64 100644
--- a/unity/action.yaml
+++ b/unity/action.yaml
@@ -2,7 +2,7 @@ name: unity
 description: "Register Unity with the provided license and run a Unity command."
 inputs:
   serial:
-    description: "Unity license serial number."
+    description: "Unity license serial number. Or 'public' for a public license."
     required: true
     default: public
   email: