diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 8b44b2d1..54fc7d72 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -9,7 +9,7 @@ repos:
     -   id: check-yaml
     -   id: check-added-large-files
 -   repo: https://github.com/psf/black
-    rev: 23.12.1
+    rev: 24.1.1
     hooks:
     -   id: black
 -   repo: https://github.com/PyCQA/isort
diff --git a/dandischema/digests/zarr.py b/dandischema/digests/zarr.py
index ae37b148..3f0257f6 100644
--- a/dandischema/digests/zarr.py
+++ b/dandischema/digests/zarr.py
@@ -76,9 +76,9 @@ def add_directory_checksums(self, checksums: List[ZarrChecksum]) -> None:
         """Add a list of directory checksums to the listing."""
         for new_checksum in checksums:
             try:
-                self.directories[
-                    self._index(self.directories, new_checksum)
-                ] = new_checksum
+                self.directories[self._index(self.directories, new_checksum)] = (
+                    new_checksum
+                )
             except ValueError:
                 self.directories.append(new_checksum)
         self.directories = sorted(self.directories)
diff --git a/dandischema/models.py b/dandischema/models.py
index 7633143b..0eca9674 100644
--- a/dandischema/models.py
+++ b/dandischema/models.py
@@ -1044,9 +1044,9 @@ class Activity(DandiBaseModel):
 
     # isPartOf: Optional["Activity"] = Field(None, json_schema_extra={"nskey": "schema"})
     # hasPart: Optional["Activity"] = Field(None, json_schema_extra={"nskey": "schema"})
-    wasAssociatedWith: Optional[
-        List[Union[Person, Organization, Software, Agent]]
-    ] = Field(None, json_schema_extra={"nskey": "prov"})
+    wasAssociatedWith: Optional[List[Union[Person, Organization, Software, Agent]]] = (
+        Field(None, json_schema_extra={"nskey": "prov"})
+    )
     used: Optional[List[Equipment]] = Field(
         None,
         description="A listing of equipment used for the activity.",
@@ -1381,9 +1381,11 @@ class CommonModel(DandiBaseModel):
     repository: Optional[AnyHttpUrl] = Field(
         # mypy doesn't like using a string as the default for an AnyHttpUrl
         # attribute, so we have to convert it to an AnyHttpUrl:
-        TypeAdapter(AnyHttpUrl).validate_python(DANDI_INSTANCE_URL)
-        if DANDI_INSTANCE_URL is not None
-        else None,
+        (
+            TypeAdapter(AnyHttpUrl).validate_python(DANDI_INSTANCE_URL)
+            if DANDI_INSTANCE_URL is not None
+            else None
+        ),
         description="location of the item",
         json_schema_extra={"nskey": "dandi", "readOnly": True},
     )