diff --git a/requirements.txt b/requirements.txt
index 5ce6fe9a..c14bff0c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+juju ~= 3.1
 ops >= 2.1.1
 pydantic>=1.10,<2
 poetry-core