diff --git a/README.md b/README.md
index d96f4fcf..0736d716 100644
--- a/README.md
+++ b/README.md
@@ -78,7 +78,7 @@ Picrin is a lightweight scheme implementation intended to comply with full R7RS
 | 4.2.5 Delayed evaluation | N/A | |
 | 4.2.6 Dynamic bindings | yes | |
 | 4.2.7 Exception handling | no | `guard` syntax. |
-| 4.2.8 Quasiquotation | yes | can be safely nested |
+| 4.2.8 Quasiquotation | yes | can be safely nested. TODO: multiple argument for unquote |
 | 4.2.9 Case-lambda | N/A | |
 | 4.3.1 Bindings constructs for syntactic keywords | incomplete | (*1) |
 | 4.3.2 Pattern language | no | `syntax-rules` |