diff --git a/charms/sunbeam-machine/requirements.txt b/charms/sunbeam-machine/requirements.txt
index 1b441bed..b8f679e9 100644
--- a/charms/sunbeam-machine/requirements.txt
+++ b/charms/sunbeam-machine/requirements.txt
@@ -8,3 +8,6 @@ jinja2
 # This charm does not use lightkube* but ops_sunbeam requires it atm
 lightkube
 lightkube-models
+
+# From ops_sunbeam
+tenacity