diff --git a/engine/include/sophia/components.hpp b/engine/include/sophia/components.hpp
index 5183b4a..d094401 100644
--- a/engine/include/sophia/components.hpp
+++ b/engine/include/sophia/components.hpp
@@ -11,7 +11,7 @@ namespace sophia {
 
 struct TagComponent {
   std::string tag;  // entt::hashed_string ?
-  uint32_t mask = 0;
+  u32 mask = 0;
 };
 
 struct TransformComponent {
@@ -100,7 +100,7 @@ struct CameraComponent {
     float farPlane = 100.f;
   };
 
-  enum class Projection { Orthographic, Perspective };
+  enum class Projection : u8 { Orthographic, Perspective };
 
   Projection projection = Projection::Orthographic;
   Orthographic ortho;