diff --git a/TODO b/TODO
index 498d0da3f497999391bb588ceac28b820a21464d..877d28815a3ac9127532f700a61830d4c402caf8 100644
--- a/TODO
+++ b/TODO
@@ -13,8 +13,11 @@ Version 1.5.0:
 * Distributed clocks:
     - Check 32/64 bit operations.
     - Use vendor correction factors when calculating transmission delays.
-    - Use SYNC1 generation.
-    - Skip setting system time offset when application detaching.
+    - Skip setting system time offset when application detached.
+    - Always set reference clock to OP.
+    - Output DC configuration in 'ethercat config'.
+    - How to set the SYNC1 shift time?
+    - Do not output graph, if topology calculation failed.
 * Fix unloading problem of ec_e100 driver.
 * Use ec_datagram_zero() where possible.
 * Fix arguments of reg_read.