diff --git a/README.md b/README.md
index 47b0043..a08518f 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,7 @@ getScoreByAge conn = do
 - [x] Test negative integer decoding, especially for `Integer`
 - [ ] Implement time intervals
 - [ ] and zoned time decoding
+- [ ] How about `timezone`? This could prove problematic when the server and application have different time zones
 - [ ] Implement `fetch` (`fetch_` but with parameter passing)
 - [ ] Implement JSON decoding
 - [ ] Implement (anonymous) composite types