diff --git a/eland/common.py b/eland/common.py
index 667313c..e23afe3 100644
--- a/eland/common.py
+++ b/eland/common.py
@@ -309,7 +309,7 @@ def elasticsearch_date_to_pandas_date(
 
 
 def ensure_es_client(
-    es_client: Union[str, List[str], Tuple[str, ...], Elasticsearch]
+    es_client: Union[str, List[str], Tuple[str, ...], Elasticsearch],
 ) -> Elasticsearch:
     if isinstance(es_client, tuple):
         es_client = list(es_client)
diff --git a/noxfile.py b/noxfile.py
index 492331e..a404d2a 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -58,7 +58,7 @@ TYPED_FILES = (
 
 @nox.session(reuse_venv=True, python="3.11")
 def format(session):
-    session.install("black", "isort", "flynt")
+    session.install("black ~= 25.0", "isort", "flynt")
     session.run("python", "utils/license-headers.py", "fix", *SOURCE_FILES)
     session.run("flynt", *SOURCE_FILES)
     session.run("black", "--target-version=py39", *SOURCE_FILES)
@@ -70,7 +70,7 @@ def format(session):
 def lint(session):
     # Install numpy to use its mypy plugin
     # https://numpy.org/devdocs/reference/typing.html#mypy-plugin
-    session.install("black", "flake8", "mypy", "isort", "numpy")
+    session.install("black ~= 25.0", "flake8", "mypy", "isort", "numpy")
     session.install(".")
     session.run("python", "utils/license-headers.py", "check", *SOURCE_FILES)
     session.run("black", "--check", "--target-version=py39", *SOURCE_FILES)