diff --git a/CHANGES.md b/CHANGES.md
new file mode 100644
index 0000000..94b0eed
--- /dev/null
+++ b/CHANGES.md
@@ -0,0 +1,15 @@
+### 0.9999 - Mon May 19 10:03:41 2014
+
+API changes:
+
+1. Remove the `route` argument from `r3_tree_insert_pathl`:
+
+    node * r3_tree_insert_pathl(node *tree, char *path, int path_len, void * data);
+
+This reduce the interface complexity, e.g.,
+
+    r3_tree_insert_path(n, "/user2/{id:\\d+}", &var2);
+
+2. The original `r3_tree_insert_pathl` has been renamed to `_r3_tree_insert_path` as a private API.
+    
+