diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 31a1cee..683bef8 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -25,3 +25,10 @@ repos:
     rev: 23.3.0
     hooks:
       - id: black
+
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v3.3.1
+    hooks:
+      - id: pyupgrade
+        args:
+          - "--py38-plus"
diff --git a/src/rok4/Pyramid.py b/src/rok4/Pyramid.py
index a3d7144..360212b 100644
--- a/src/rok4/Pyramid.py
+++ b/src/rok4/Pyramid.py
@@ -778,7 +778,7 @@ def list_generator(self) -> Iterator[Tuple[Tuple[SlabType, str, int, int], Dict]
             roots = {}
             s3_cluster = self.storage_s3_cluster
 
-            with open(list_file, "r") as listin:
+            with open(list_file) as listin:
                 # Lecture des racines
                 for line in listin:
                     line = line.rstrip()
diff --git a/src/rok4/Storage.py b/src/rok4/Storage.py
index 11d59f1..41df631 100644
--- a/src/rok4/Storage.py
+++ b/src/rok4/Storage.py
@@ -841,11 +841,9 @@ def link(target_path: str, link_path: str, hard: bool = False) -> None:
 
         try:
             target_s3_client["client"].put_object(
-                Body=f"{__OBJECT_SYMLINK_SIGNATURE}{target_bucket}/{target_base_name}".encode(
-                    "utf-8"
-                ),
-                Bucket=link_bucket,
-                Key=link_base_name,
+                Body = f"{__OBJECT_SYMLINK_SIGNATURE}{target_bucket}/{target_base_name}".encode(),
+                Bucket = link_bucket,
+                Key = link_base_name
             )
         except Exception as e:
             raise StorageError("S3", e)
@@ -854,9 +852,7 @@ def link(target_path: str, link_path: str, hard: bool = False) -> None:
         ioctx = __get_ceph_ioctx(link_tray)
 
         try:
-            ioctx.write_full(
-                link_base_name, f"{__OBJECT_SYMLINK_SIGNATURE}{target_path}".encode("utf-8")
-            )
+            ioctx.write_full(link_base_name, f"{__OBJECT_SYMLINK_SIGNATURE}{target_path}".encode())
         except Exception as e:
             raise StorageError("CEPH", e)