diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 6a19f732..6adac249 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -28,11 +28,11 @@ repos:
     -   id: mixed-line-ending
     -   id: trailing-whitespace
 -   repo: https://github.com/asottile/pyupgrade
-    rev: v3.19.0
+    rev: v3.19.1
     hooks:
     -   id: pyupgrade
 -   repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.8.2
+    rev: v0.9.7
     hooks:
     -   id: ruff
         types_or: [ python, pyi, jupyter ]
diff --git a/src/pydrex/io.py b/src/pydrex/io.py
index 7ccad9de..b903a0e7 100644
--- a/src/pydrex/io.py
+++ b/src/pydrex/io.py
@@ -102,7 +102,7 @@ def extract_h5part(
                 strains[t] = f[f"{k}/CPO_{n_grains * 10 + 1}"][particle_id - 1]
                 vals = np.empty(n_grains * 10)
                 for n in range(len(vals)):
-                    vals[n] = f[f"{k}/CPO_{n+1}"][particle_id - 1]
+                    vals[n] = f[f"{k}/CPO_{n + 1}"][particle_id - 1]
 
                 orientations[t] = np.array(
                     [
@@ -456,7 +456,7 @@ def parse_config(path):
 
     # Use provided name or set randomized default.
     toml["name"] = toml.get(
-        "name", f"pydrex.{np.random.default_rng().integers(1,1e10)}"
+        "name", f"pydrex.{np.random.default_rng().integers(1, 1e10)}"
     )
 
     toml["parameters"] = _parse_config_params(toml)
diff --git a/src/pydrex/visualisation.py b/src/pydrex/visualisation.py
index fc2cad00..70abdde4 100644
--- a/src/pydrex/visualisation.py
+++ b/src/pydrex/visualisation.py
@@ -32,7 +32,7 @@
 
 
 def default_tick_formatter(x, pos):
-    return f"{x/1e3:.1f}"
+    return f"{x / 1e3:.1f}"
 
 
 def polefigures(
diff --git a/tests/test_corner_flow_2d.py b/tests/test_corner_flow_2d.py
index 02415e07..e3be632b 100644
--- a/tests/test_corner_flow_2d.py
+++ b/tests/test_corner_flow_2d.py
@@ -176,7 +176,7 @@ def test_steady4(self, outdir, seed, ncpus):
                     _log.debug("Total walltime: %s", perf_counter() - _begin)
 
                     if outdir is not None:
-                        labels.append(rf"$z_{{f}}$ = {z_exit/1e3:.1f} km")
+                        labels.append(rf"$z_{{f}}$ = {z_exit / 1e3:.1f} km")
                         angles.append(misorient_angles)
                         indices.append(misorient_indices)
                         paths.append(positions)
diff --git a/tests/test_diagnostics.py b/tests/test_diagnostics.py
index 294a6a6a..5216f2b4 100644
--- a/tests/test_diagnostics.py
+++ b/tests/test_diagnostics.py
@@ -333,9 +333,9 @@ def test_textures_increasing_ortho(self, seed):
             M_vals[i] = _diagnostics.misorientation_index(
                 orientations, _geo.LatticeSystem.orthorhombic
             )
-        assert np.all(
-            np.diff(M_vals) >= 0
-        ), f"M-index values {M_vals} are not increasing"
+        assert np.all(np.diff(M_vals) >= 0), (
+            f"M-index values {M_vals} are not increasing"
+        )
 
     def test_texture_girdle_ortho(self, seed):
         """Test M-index for girdled texture."""