diff --git a/package-lock.json b/package-lock.json
index 57fca0d..475b9c6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,7 +14,7 @@
       "devDependencies": {
         "@11ty/eleventy": "^2.0.1",
         "ava": "^5.3.1",
-        "c8": "^8.0.1",
+        "c8": "^9.1.0",
         "execa": "^8.0.1",
         "xo": "^0.56.0"
       },
@@ -1685,19 +1685,18 @@
       }
     },
     "node_modules/c8": {
-      "version": "8.0.1",
-      "resolved": "https://registry.npmjs.org/c8/-/c8-8.0.1.tgz",
-      "integrity": "sha512-EINpopxZNH1mETuI0DzRA4MZpAUH+IFiRhnmFD3vFr3vdrgxqi3VfE3KL0AIL+zDq8rC9bZqwM/VDmmoe04y7w==",
+      "version": "9.1.0",
+      "resolved": "https://registry.npmjs.org/c8/-/c8-9.1.0.tgz",
+      "integrity": "sha512-mBWcT5iqNir1zIkzSPyI3NCR9EZCVI3WUD+AVO17MVWTSFNyUueXE82qTeampNtTr+ilN/5Ua3j24LgbCKjDVg==",
       "dev": true,
       "dependencies": {
         "@bcoe/v8-coverage": "^0.2.3",
         "@istanbuljs/schema": "^0.1.3",
         "find-up": "^5.0.0",
-        "foreground-child": "^2.0.0",
+        "foreground-child": "^3.1.1",
         "istanbul-lib-coverage": "^3.2.0",
         "istanbul-lib-report": "^3.0.1",
         "istanbul-reports": "^3.1.6",
-        "rimraf": "^3.0.2",
         "test-exclude": "^6.0.0",
         "v8-to-istanbul": "^9.0.0",
         "yargs": "^17.7.2",
@@ -1707,7 +1706,7 @@
         "c8": "bin/c8.js"
       },
       "engines": {
-        "node": ">=12"
+        "node": ">=14.14.0"
       }
     },
     "node_modules/call-bind": {
@@ -3733,16 +3732,31 @@
       }
     },
     "node_modules/foreground-child": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/foreground-child/-/foreground-child-2.0.0.tgz",
-      "integrity": "sha512-dCIq9FpEcyQyXKCkyzmlPTFNgrCzPudOe+mhvJU5zAtlBnGVy2yKxtfsxK2tQBThwq225jcvBjpw1Gr40uzZCA==",
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/foreground-child/-/foreground-child-3.1.1.tgz",
+      "integrity": "sha512-TMKDUnIte6bfb5nWv7V/caI169OHgvwjb7V4WkeUvbQQdjr5rWKqHFiKWb/fcOwB+CzBT+qbWjvj+DVwRskpIg==",
       "dev": true,
       "dependencies": {
         "cross-spawn": "^7.0.0",
-        "signal-exit": "^3.0.2"
+        "signal-exit": "^4.0.1"
       },
       "engines": {
-        "node": ">=8.0.0"
+        "node": ">=14"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/isaacs"
+      }
+    },
+    "node_modules/foreground-child/node_modules/signal-exit": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-4.1.0.tgz",
+      "integrity": "sha512-bzyZ1e88w9O1iNJbKnOlvYTrWPDl46O1bG0D3XInv+9tkPrxrN8jUUTiFlDkkmKWgn1M6CfIA13SuGqOa9Korw==",
+      "dev": true,
+      "engines": {
+        "node": ">=14"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/isaacs"
       }
     },
     "node_modules/fs.realpath": {
@@ -9723,19 +9737,18 @@
       }
     },
     "c8": {
-      "version": "8.0.1",
-      "resolved": "https://registry.npmjs.org/c8/-/c8-8.0.1.tgz",
-      "integrity": "sha512-EINpopxZNH1mETuI0DzRA4MZpAUH+IFiRhnmFD3vFr3vdrgxqi3VfE3KL0AIL+zDq8rC9bZqwM/VDmmoe04y7w==",
+      "version": "9.1.0",
+      "resolved": "https://registry.npmjs.org/c8/-/c8-9.1.0.tgz",
+      "integrity": "sha512-mBWcT5iqNir1zIkzSPyI3NCR9EZCVI3WUD+AVO17MVWTSFNyUueXE82qTeampNtTr+ilN/5Ua3j24LgbCKjDVg==",
       "dev": true,
       "requires": {
         "@bcoe/v8-coverage": "^0.2.3",
         "@istanbuljs/schema": "^0.1.3",
         "find-up": "^5.0.0",
-        "foreground-child": "^2.0.0",
+        "foreground-child": "^3.1.1",
         "istanbul-lib-coverage": "^3.2.0",
         "istanbul-lib-report": "^3.0.1",
         "istanbul-reports": "^3.1.6",
-        "rimraf": "^3.0.2",
         "test-exclude": "^6.0.0",
         "v8-to-istanbul": "^9.0.0",
         "yargs": "^17.7.2",
@@ -11245,13 +11258,21 @@
       }
     },
     "foreground-child": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/foreground-child/-/foreground-child-2.0.0.tgz",
-      "integrity": "sha512-dCIq9FpEcyQyXKCkyzmlPTFNgrCzPudOe+mhvJU5zAtlBnGVy2yKxtfsxK2tQBThwq225jcvBjpw1Gr40uzZCA==",
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/foreground-child/-/foreground-child-3.1.1.tgz",
+      "integrity": "sha512-TMKDUnIte6bfb5nWv7V/caI169OHgvwjb7V4WkeUvbQQdjr5rWKqHFiKWb/fcOwB+CzBT+qbWjvj+DVwRskpIg==",
       "dev": true,
       "requires": {
         "cross-spawn": "^7.0.0",
-        "signal-exit": "^3.0.2"
+        "signal-exit": "^4.0.1"
+      },
+      "dependencies": {
+        "signal-exit": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-4.1.0.tgz",
+          "integrity": "sha512-bzyZ1e88w9O1iNJbKnOlvYTrWPDl46O1bG0D3XInv+9tkPrxrN8jUUTiFlDkkmKWgn1M6CfIA13SuGqOa9Korw==",
+          "dev": true
+        }
       }
     },
     "fs.realpath": {
diff --git a/package.json b/package.json
index 5d0c506..4f05d4e 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
   "devDependencies": {
     "@11ty/eleventy": "^2.0.1",
     "ava": "^5.3.1",
-    "c8": "^8.0.1",
+    "c8": "^9.1.0",
     "execa": "^8.0.1",
     "xo": "^0.56.0"
   },