diff --git a/package.json b/package.json
index b19a3b0..36a8f57 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "@types/node": "^20.9.2",
     "@typescript-eslint/eslint-plugin": "^6.11.0",
     "@typescript-eslint/parser": "^6.11.0",
-    "c8": "^8.0.1",
+    "c8": "^9.1.0",
     "chai": "^4.3.10",
     "del-cli": "^5.1.0",
     "eslint": "^8.54.0",
diff --git a/yarn.lock b/yarn.lock
index 6b62628..d3a381a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -663,19 +663,18 @@ builtin-modules@^3.3.0:
   resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-3.3.0.tgz#cae62812b89801e9656336e46223e030386be7b6"
   integrity sha512-zhaCDicdLuWN5UbN5IMnFqNMhNfo919sH85y2/ea+5Yg9TsTkeZxpL+JLbp6cgYFS4sRLp3YV4S6yDuqVWHYOw==
 
-c8@^8.0.1:
-  version "8.0.1"
-  resolved "https://registry.yarnpkg.com/c8/-/c8-8.0.1.tgz#bafd60be680e66c5530ee69f621e45b1364af9fd"
-  integrity sha512-EINpopxZNH1mETuI0DzRA4MZpAUH+IFiRhnmFD3vFr3vdrgxqi3VfE3KL0AIL+zDq8rC9bZqwM/VDmmoe04y7w==
+c8@^9.1.0:
+  version "9.1.0"
+  resolved "https://registry.yarnpkg.com/c8/-/c8-9.1.0.tgz#0e57ba3ab9e5960ab1d650b4a86f71e53cb68112"
+  integrity sha512-mBWcT5iqNir1zIkzSPyI3NCR9EZCVI3WUD+AVO17MVWTSFNyUueXE82qTeampNtTr+ilN/5Ua3j24LgbCKjDVg==
   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"
@@ -1459,15 +1458,7 @@ for-each@^0.3.3:
   dependencies:
     is-callable "^1.1.3"
 
-foreground-child@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/foreground-child/-/foreground-child-2.0.0.tgz#71b32800c9f15aa8f2f83f4a6bd9bff35d861a53"
-  integrity sha512-dCIq9FpEcyQyXKCkyzmlPTFNgrCzPudOe+mhvJU5zAtlBnGVy2yKxtfsxK2tQBThwq225jcvBjpw1Gr40uzZCA==
-  dependencies:
-    cross-spawn "^7.0.0"
-    signal-exit "^3.0.2"
-
-foreground-child@^3.1.0:
+foreground-child@^3.1.0, foreground-child@^3.1.1:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/foreground-child/-/foreground-child-3.1.1.tgz#1d173e776d75d2772fed08efe4a0de1ea1b12d0d"
   integrity sha512-TMKDUnIte6bfb5nWv7V/caI169OHgvwjb7V4WkeUvbQQdjr5rWKqHFiKWb/fcOwB+CzBT+qbWjvj+DVwRskpIg==
@@ -3564,11 +3555,6 @@ side-channel@^1.0.4:
     get-intrinsic "^1.0.2"
     object-inspect "^1.9.0"
 
-signal-exit@^3.0.2:
-  version "3.0.7"
-  resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.7.tgz#a9a1767f8af84155114eaabd73f99273c8f59ad9"
-  integrity sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==
-
 signal-exit@^4.0.1:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-4.1.0.tgz#952188c1cbd546070e2dd20d0f41c0ae0530cb04"