diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index db9d59f..4e5c718 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -40,7 +40,7 @@ repos:
     args: ["--py36-plus"]
 
 - repo: https://github.com/psf/black
-  rev: "23.12.1"
+  rev: "24.1.1"
   hooks:
   - id: black
 
@@ -58,7 +58,7 @@ repos:
     args: ["--all"]
 
 - repo: https://github.com/PyCQA/flake8
-  rev: "6.1.0"
+  rev: "7.0.0"
   hooks:
   - id: flake8
     additional_dependencies: [
@@ -70,7 +70,7 @@ repos:
     args: ["--docstring-convention", "numpy"]  # or google, change me
 
 - repo: https://github.com/kynan/nbstripout
-  rev: "0.6.1"
+  rev: "0.7.1"
   hooks:
     - id: nbstripout
       args: ["--strip-empty-cells",
diff --git a/src/legendoptics/fibers.py b/src/legendoptics/fibers.py
index 745f614..ff77dce 100644
--- a/src/legendoptics/fibers.py
+++ b/src/legendoptics/fibers.py
@@ -3,6 +3,7 @@
 
 .. [SaintGobainDataSheet] https://www.crystals.saint-gobain.com/sites/hps-mac3-cma-crystals/files/2021-11/Fiber-Product-Sheet.pdf
 """
+
 from __future__ import annotations
 
 import logging
diff --git a/src/legendoptics/lar.py b/src/legendoptics/lar.py
index d62ba4c..28800c6 100644
--- a/src/legendoptics/lar.py
+++ b/src/legendoptics/lar.py
@@ -22,6 +22,7 @@
     from liquid argon and xenon.” In: Phys. Rev. B 27 (9 May 1983), pp. 5279–5285,
     https://doi.org/10.1103/PhysRevB.27.5279
 """
+
 from __future__ import annotations
 
 import logging
@@ -96,10 +97,7 @@ def lar_dielectric_constant_cern2020(
             f"this parametrization holds only between {λ_uv+1*u.nm} and {λ_ir-1*u.nm}"
         )
 
-    x = 0.334 + (
-        (0.100 * λ**2) / (λ**2 - λ_uv**2)
-        + (0.008 * λ**2) / (λ**2 - λ_ir**2)
-    )
+    x = 0.334 + ((0.100 * λ**2) / (λ**2 - λ_uv**2) + (0.008 * λ**2) / (λ**2 - λ_ir**2))
 
     # solve Clausius-Mossotti
     return (3 + 2 * x) / (3 - x)
diff --git a/src/legendoptics/pen.py b/src/legendoptics/pen.py
index 5d389b8..c9eea9a 100644
--- a/src/legendoptics/pen.py
+++ b/src/legendoptics/pen.py
@@ -10,6 +10,7 @@
 .. [Ouchi2006] I. Ouchi et al. “Features of Fluorescence Spectra of Polyethylene 2,6-Naphthalate Films”
     In: Journal of Applied Polymer Science, Vol. 105, 114–121 (2007), https://doi.org/10.1002/app.26085
 """
+
 from __future__ import annotations
 
 import logging
diff --git a/src/legendoptics/tetratex.py b/src/legendoptics/tetratex.py
index f0e24fd..b87ad7e 100644
--- a/src/legendoptics/tetratex.py
+++ b/src/legendoptics/tetratex.py
@@ -3,6 +3,7 @@
 
 .. [Janacek2012] M. Janacek, "Reflectivity spectra for commonly used reflectors", https://www.osti.gov/servlets/purl/1184400
 """
+
 from __future__ import annotations
 
 import logging
diff --git a/tests/test_pyg4.py b/tests/test_pyg4.py
index 3f3bb90..ce0622a 100644
--- a/tests/test_pyg4.py
+++ b/tests/test_pyg4.py
@@ -1,4 +1,5 @@
 """Test the attaching of all properties to Geant4 materials."""
+
 import pint
 import pyg4ometry.geant4 as g4