diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d2075a6..25b05a7 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -8,7 +8,7 @@ ci:
 
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: "v0.11.13"
+    rev: "v0.16.0"
     hooks:
       - id: ruff
         types_or: [python, pyi, jupyter]
@@ -17,7 +17,7 @@ repos:
         types_or: [python, pyi, jupyter]
 
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v5.0.0
+    rev: v6.0.0
     hooks:
       - id: trailing-whitespace
         exclude: '.*\.fits$'
@@ -31,7 +31,7 @@ repos:
         args: ["--maxkb=10000"]
 
   - repo: https://github.com/kynan/nbstripout
-    rev: 0.8.1
+    rev: 0.9.1
     hooks:
       - id: nbstripout
         args: ["--extra-keys=metadata.kernelspec metadata.language_info.version metadata.toc"]
diff --git a/AUTHORS.md b/AUTHORS.md
index acad72f..1305bb1 100644
--- a/AUTHORS.md
+++ b/AUTHORS.md
@@ -1 +1 @@
-Neil Crighton, Stephanie T. Douglas
\ No newline at end of file
+Neil Crighton, Stephanie T. Douglas
diff --git a/redshift-plot.ipynb b/redshift-plot.ipynb
index 9f5fa50..2102056 100755
--- a/redshift-plot.ipynb
+++ b/redshift-plot.ipynb
@@ -58,8 +58,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from astropy.cosmology import FlatLambdaCDM\n",
     "import astropy.units as u\n",
+    "from astropy.cosmology import FlatLambdaCDM\n",
     "\n",
     "# In this case we just need to define the matter density\n",
     "# and hubble parameter at z=0.\n",
@@ -197,7 +197,7 @@
     "ax.plot(zvals, dist)\n",
     "ax2 = ax.twiny()\n",
     "ax2.set_xticks(ageticks)\n",
-    "ax2.set_xticklabels([\"{:g}\".format(age) for age in ages.value])"
+    "ax2.set_xticklabels([f\"{age:g}\" for age in ages.value])"
    ]
   },
   {
@@ -218,7 +218,7 @@
     "ax.plot(zvals, dist)\n",
     "ax2 = ax.twiny()\n",
     "ax2.set_xticks(ageticks)\n",
-    "ax2.set_xticklabels([\"{:g}\".format(age) for age in ages.value])\n",
+    "ax2.set_xticklabels([f\"{age:g}\" for age in ages.value])\n",
     "zmin, zmax = 0.0, 5.9\n",
     "ax.set_xlim(zmin, zmax)\n",
     "ax2.set_xlim(zmin, zmax)"
@@ -242,7 +242,7 @@
     "ax.plot(zvals, dist)\n",
     "ax2 = ax.twiny()\n",
     "ax2.set_xticks(ageticks)\n",
-    "ax2.set_xticklabels([\"{:g}\".format(age) for age in ages.value])\n",
+    "ax2.set_xticklabels([f\"{age:g}\" for age in ages.value])\n",
     "zmin, zmax = 0, 5.9\n",
     "ax.set_xlim(zmin, zmax)\n",
     "ax2.set_xlim(zmin, zmax)\n",
@@ -273,11 +273,11 @@
     "fig = plt.figure(figsize=(6, 4))\n",
     "ax = fig.add_subplot(111)\n",
     "ax.plot(zvals, dist2, label=\"Planck 2013\")\n",
-    "ax.plot(zvals, dist, label=\"$h=0.7,\\ \\Omega_M=0.3,\\ \\Omega_\\Lambda=0.7$\")\n",
+    "ax.plot(zvals, dist, label=r\"$h=0.7,\\ \\Omega_M=0.3,\\ \\Omega_\\Lambda=0.7$\")\n",
     "ax.legend(frameon=0, loc=\"lower right\")\n",
     "ax2 = ax.twiny()\n",
     "ax2.set_xticks(ageticks)\n",
-    "ax2.set_xticklabels([\"{:g}\".format(age) for age in ages.value])\n",
+    "ax2.set_xticklabels([f\"{age:g}\" for age in ages.value])\n",
     "zmin, zmax = 0.0, 5.9\n",
     "ax.set_xlim(zmin, zmax)\n",
     "ax2.set_xlim(zmin, zmax)\n",