diff --git a/requirements.txt b/requirements.txt
index 8a597bacbdb15c57ac74316e8c243d17c64b26bc..818caf7311d7521391980a3a53c5a8b2397feef1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+pylibi2c (github.com/amaork/libi2c)
 opcua
 numpy
 recordclass