diff --git a/unity-project/action.yaml b/unity-project/action.yaml
index b6a0edd..6c87be6 100644
--- a/unity-project/action.yaml
+++ b/unity-project/action.yaml
@@ -1,7 +1,7 @@
 name: unity-project
 description: "Run a Unity command using a project's version and a build target."
 inputs:
-  projectPath: 
+  projectPath:
     description: "Path to the Unity project."
     required: true
     default: "."
@@ -11,6 +11,7 @@ inputs:
   serial:
     description: "Unity license serial number."
     required: true
+    default: public
   email:
     description: "Unity email."
     required: true
diff --git a/unity/action.yaml b/unity/action.yaml
index e6d2ded..98748ee 100644
--- a/unity/action.yaml
+++ b/unity/action.yaml
@@ -4,6 +4,7 @@ inputs:
   serial:
     description: "Unity license serial number."
     required: true
+    default: public
   email:
     description: "Unity email."
     required: true