diff --git a/README.md b/README.md
index 478fbd9c9c4ede4c6945207a7f289c5a8ee70e97..5b2a0416a987bbe16f5e261acf701f2c6333bd21 100644
--- a/README.md
+++ b/README.md
@@ -43,4 +43,8 @@
 TODO
 ----
 
-- ...
+- write about unittest (AR)
+- gro reader
+  - read more than one block
+  - read velocities
+  - detect number of decimal places