diff --git a/conf/aggregator.dev.py b/conf/aggregator.dev.py
index 89bd12e0..d6ea4602 100644
--- a/conf/aggregator.dev.py
+++ b/conf/aggregator.dev.py
@@ -13,7 +13,7 @@
         "https://editor.openeo.cloud",
         "http://localhost:1410/",
         "https://editor.openeo.org",
-    ]
+    ],
 }
 
 _DEFAULT_EGI_SCOPES = [
@@ -64,18 +64,15 @@
         "type": "chained",
         "config": {
             "parts": [
-                {
-                    "type": "dict",
-                    "config": {"default_ttl": 5 * 60}
-                },
+                {"type": "dict", "config": {"default_ttl": 5 * 60}},
                 {
                     "type": "zookeeper",
                     "config": {
                         "zk_hosts": ZK_HOSTS,
                         "default_ttl": 24 * 60 * 60,
-                    }
-                }
+                    },
+                },
             ]
-        }
+        },
     },
 )
diff --git a/conf/aggregator.prod.py b/conf/aggregator.prod.py
index 73a2d0a3..1de2021c 100644
--- a/conf/aggregator.prod.py
+++ b/conf/aggregator.prod.py
@@ -13,7 +13,7 @@
         "https://editor.openeo.cloud",
         "http://localhost:1410/",
         "https://editor.openeo.org",
-    ]
+    ],
 }
 
 _DEFAULT_EGI_SCOPES = [
@@ -56,18 +56,15 @@
         "type": "chained",
         "config": {
             "parts": [
-                {
-                    "type": "dict",
-                    "config": {"default_ttl": 5 * 60}
-                },
+                {"type": "dict", "config": {"default_ttl": 5 * 60}},
                 {
                     "type": "zookeeper",
                     "config": {
                         "zk_hosts": ZK_HOSTS,
                         "default_ttl": 24 * 60 * 60,
-                    }
-                }
+                    },
+                },
             ]
-        }
+        },
     },
 )
diff --git a/scripts/crossbackend-processing-poc.py b/scripts/crossbackend-processing-poc.py
index 3d2f7b01..e8b83e57 100644
--- a/scripts/crossbackend-processing-poc.py
+++ b/scripts/crossbackend-processing-poc.py
@@ -62,9 +62,7 @@ def backend_for_collection(collection_id) -> str:
         metadata = connection.describe_collection(collection_id)
         return metadata["summaries"][STAC_PROPERTY_FEDERATION_BACKENDS][0]
 
-    splitter = CrossBackendSplitter(
-        backend_for_collection=backend_for_collection, always_split=True
-    )
+    splitter = CrossBackendSplitter(backend_for_collection=backend_for_collection, always_split=True)
     pjob: PartitionedJob = splitter.split({"process_graph": process_graph})
     _log.info(f"Partitioned job: {pjob!r}")
 
diff --git a/src/openeo_aggregator/app.py b/src/openeo_aggregator/app.py
index 0cf0a098..a4cb7514 100644
--- a/src/openeo_aggregator/app.py
+++ b/src/openeo_aggregator/app.py
@@ -1,6 +1,7 @@
 """
 openeo-aggregator Flask app
 """
+
 import logging
 import os
 from pathlib import Path
diff --git a/src/openeo_aggregator/caching.py b/src/openeo_aggregator/caching.py
index 72d693a2..d9b5ded3 100644
--- a/src/openeo_aggregator/caching.py
+++ b/src/openeo_aggregator/caching.py
@@ -123,12 +123,10 @@ def __init__(self, namespace: str = DEFAULT_NAMESPACE):
         self._namespace = namespace
 
     @abc.abstractmethod
-    def get_or_call(self, key: CacheKey, callback: Callable[[], Any], ttl: Optional[float] = None) -> Any:
-        ...
+    def get_or_call(self, key: CacheKey, callback: Callable[[], Any], ttl: Optional[float] = None) -> Any: ...
 
     @abc.abstractmethod
-    def invalidate(self):
-        ...
+    def invalidate(self): ...
 
     def wrap(self, key: CacheKey, ttl: Optional[float] = None):
         """Wrapper to use memoizer as function/method decorator."""
diff --git a/src/openeo_aggregator/connection.py b/src/openeo_aggregator/connection.py
index 1a1b8541..e799d663 100644
--- a/src/openeo_aggregator/connection.py
+++ b/src/openeo_aggregator/connection.py
@@ -258,7 +258,7 @@ def from_config() -> "MultiBackendConnection":
 
     def _get_connections(self, skip_failures=False) -> Iterator[BackendConnection]:
         """Create new backend connections."""
-        for (bid, url) in self._backend_urls.items():
+        for bid, url in self._backend_urls.items():
             try:
                 _log.info(f"Create backend {bid!r} connection to {url!r}")
                 # TODO: Creating connection usually involves version discovery and request of capability doc.
diff --git a/src/openeo_aggregator/metadata/merging.py b/src/openeo_aggregator/metadata/merging.py
index aa4e62fb..b7f0a277 100644
--- a/src/openeo_aggregator/metadata/merging.py
+++ b/src/openeo_aggregator/metadata/merging.py
@@ -3,6 +3,7 @@
 Functionality and tools for openEO collection/process metadata processing, normalizing, merging ...
 
 """
+
 import difflib
 import functools
 import json
diff --git a/src/openeo_aggregator/metadata/models/temporal_extent.py b/src/openeo_aggregator/metadata/models/temporal_extent.py
index 8f3c0435..6c4f909c 100644
--- a/src/openeo_aggregator/metadata/models/temporal_extent.py
+++ b/src/openeo_aggregator/metadata/models/temporal_extent.py
@@ -35,8 +35,9 @@ def to_dict(self) -> Dict[str, Any]:
             for interval_item_data in self.interval:
                 interval_item = []
                 for interval_item_item_data in interval_item_data:
-                    interval_item_item = interval_item_item_data.isoformat().replace("+00:00", "Z") \
-                        if interval_item_item_data else None
+                    interval_item_item = (
+                        interval_item_item_data.isoformat().replace("+00:00", "Z") if interval_item_item_data else None
+                    )
                     interval_item.append(interval_item_item)
 
                 interval.append(interval_item)