diff --git a/src/data-structures/trampoline.ts b/src/utils/trampoline.ts
similarity index 94%
rename from src/data-structures/trampoline.ts
rename to src/utils/trampoline.ts
index 916e34d..b21284e 100644
--- a/src/data-structures/trampoline.ts
+++ b/src/utils/trampoline.ts
@@ -1,3 +1,7 @@
+/**
+ * @copyright 2030 Tyler Zeng <zrwusa@gmail.com>
+ * @license MIT
+ */
 export const THUNK_SYMBOL = Symbol('thunk')
 
 export const isThunk = (fnOrValue: any) => {
diff --git a/src/data-structures/types/utils.ts b/src/utils/types/utils.ts
similarity index 100%
rename from src/data-structures/types/utils.ts
rename to src/utils/types/utils.ts