diff --git a/registry.txt b/registry.txt
index 19402e7e..02e5a9d9 100644
--- a/registry.txt
+++ b/registry.txt
@@ -3949,3 +3949,4 @@ https://github.com/kchemorion/MBEDSpeech.git|Contributed|MBEDSpeech
 https://github.com/KravitzLabDevices/FORCE_library.git|Contributed|Force
 https://github.com/siktec-lab/SIK-Rotary-Encoder.git|Contributed|SIKTEC_Rotary
 https://github.com/RobTillaart/ShiftOutSlow.git|Contributed|ShiftOutSlow
+https://github.com/RobTillaart/ShiftInSlow.git|Contributed|ShiftInSlow