diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 06172fb..70d0490 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -3,7 +3,7 @@ ci:
 
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: "v5.0.0"
+    rev: "v6.0.0"
     hooks:
       - id: check-case-conflict
       - id: check-docstring-first
@@ -17,8 +17,8 @@ repos:
       - id: mixed-line-ending
       - id: trailing-whitespace
 
-  - repo: https://github.com/psf/black
-    rev: "25.1.0"
+  - repo: https://github.com/psf/black-pre-commit-mirror
+    rev: "25.12.0"
     hooks:
       - id: black
         args: [--preview, --enable-unstable-feature, string_processing]
diff --git a/src/s1reader/s1_annotation.py b/src/s1reader/s1_annotation.py
index 7cdcb11..75cf901 100644
--- a/src/s1reader/s1_annotation.py
+++ b/src/s1reader/s1_annotation.py
@@ -1226,13 +1226,13 @@ def from_polynomial_lists(
         """
 
         # Extract polynomial info for azimuth FM rate
-        (fm_rate_aztime_burst_vec, fm_rate_coeff_burst_arr, fm_rate_tau0_burst_vec) = (
+        fm_rate_aztime_burst_vec, fm_rate_coeff_burst_arr, fm_rate_tau0_burst_vec = (
             cls.extract_polynomial_sequence(
                 az_fm_rate_list, sensing_start, sensing_end, handle_out_of_range=True
             )
         )
 
-        (dc_aztime_burst_vec, dc_coeff_burst_arr, dc_tau0_burst_vec) = (
+        dc_aztime_burst_vec, dc_coeff_burst_arr, dc_tau0_burst_vec = (
             cls.extract_polynomial_sequence(
                 doppler_centroid_list,
                 sensing_start,
diff --git a/src/s1reader/s1_reader.py b/src/s1reader/s1_reader.py
index 501e4b9..d8d4327 100644
--- a/src/s1reader/s1_reader.py
+++ b/src/s1reader/s1_reader.py
@@ -151,7 +151,7 @@ def doppler_poly1d_to_lut2d(
     _ : LUT2d
         LUT2d calculated from poly1d.
     """
-    (n_lines, n_samples) = shape
+    n_lines, n_samples = shape
     # calculate all slant ranges in grid
     slant_ranges = starting_slant_range + np.arange(n_samples) * slant_range_res