diff --git a/poetry.lock b/poetry.lock
index 59d9fa221..fd405cdd8 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2620,4 +2620,4 @@ test = ["big-O", "importlib-resources", "jaraco.functools", "jaraco.itertools",
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.10"
-content-hash = "725735ba66057c49b5f64e5a1bf8397886a0a88ad77d4987a658d365bb2acbf0"
+content-hash = "2e40d85d7dba3ccf925a2186492a8bd131320091509038a1fda94edcf119bd2a"
diff --git a/pyproject.toml b/pyproject.toml
index f5263b8b6..c7b17b53c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,8 @@ authors = []
 python = "^3.10"
 ops = "^2.7.0"
 lightkube = "^0.14.0"
-tenacity = "^8.2.2"
+# TODO: remove upper pin https://github.com/canonical/mysql-k8s-operator/issues/442
+tenacity = "^8.2.2, <8.4"
 boto3 = "^1.28.22"
 jinja2 = "^3.1.2"