diff --git a/notes.md b/notes.md
index 736a896..291611f 100644
--- a/notes.md
+++ b/notes.md
@@ -233,3 +233,4 @@
 2021-02-13T02:35:00 - Experimenting with FPGA constraints (source: Trimberger 'Three Ages of FPGAs') (stable-baselines3)
 2021-04-05T07:20:00 - Minor doc updates: linking to article on quantization (stable-baselines3)
 2021-04-05T08:42:00 - Refactor for clarity, might break a few tests though (stable-baselines3)
+2021-04-05T02:13:00 - Experimenting with FPGA constraints (source: Trimberger 'Three Ages of FPGAs') (stable-baselines3)