diff --git a/Sources/Core/Package/Sources/iMastPackageMacros/PackageMacro.swift b/Sources/Core/Package/Sources/iMastPackageMacros/PackageMacro.swift
index 607c8a73..98def364 100644
--- a/Sources/Core/Package/Sources/iMastPackageMacros/PackageMacro.swift
+++ b/Sources/Core/Package/Sources/iMastPackageMacros/PackageMacro.swift
@@ -32,7 +32,10 @@ public struct UserInfoPropertyMacro: AccessorMacro {
             // TODO: throw error like "type annotation is required"
             return []
         }
-        let optionalInnerType = typeAnot.type.cast(OptionalTypeSyntax.self).wrappedType
+        guard let optionalInnerType = typeAnot.type.as(OptionalTypeSyntax.self)?.wrappedType else {
+            // TODO: throw error like "type should be optional wrapped"
+            return []
+        }
         return [
             """
             get {