diff --git a/src/device/requirements.in b/src/device/requirements.in
index 506bdd9e4ede8d0212362709739f3e3bedc0c908..044f01715a2cfe700bef75847e3a105bc47f89c5 100644
--- a/src/device/requirements.in
+++ b/src/device/requirements.in
@@ -5,4 +5,5 @@ grpcio
 prometheus-client
 pytest
 pytest-benchmark
+pytz
 redis