diff --git a/poetry.lock b/poetry.lock
index 98acb62..c6490dc 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1462,7 +1462,7 @@ testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-
 [metadata]
 lock-version = "1.1"
 python-versions = ">=3.7,<3.9"
-content-hash = "c19782b9b5f05ccec8a6a95b1c815cf7463a49b78841175e5df3e4c5cad8f139"
+content-hash = "e640e66a76edd5d74220fc0dba5e10a3b1c3a8bb8d795a59fd987c3dc071d998"
 
 [metadata.files]
 absl-py = [
diff --git a/pyproject.toml b/pyproject.toml
index bb87d53..03b441f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ cluster_aizynth_output = "route_distances.tools.cluster_aizynth_output:main"
 python = ">=3.7,<3.9"
 torch = "^1.7.1"
 pytorch-tree-lstm = "^0.1.3"
-pytorch-lightning = "^1.5.0"
+pytorch-lightning = "^1.5.8"
 optuna = "^2.5.0"
 tables = "^3.6.0"
 apted = "^1.0.3"