diff --git a/package.json b/package.json
index 889df3d5..888282c5 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,7 @@
     "@typescript-eslint/parser": "^6.13.2",
     "ava": "^6.0.0",
     "bun-types": "^1.0.15",
-    "c8": "^8.0.1",
+    "c8": "^9.0.0",
     "cross-env": "^7.0.3",
     "electron": "^28.0.0",
     "esbuild": "^0.19.8",
diff --git a/yarn.lock b/yarn.lock
index c1bdd87a..350b6b91 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2889,25 +2889,24 @@ __metadata:
   languageName: node
   linkType: hard
 
-"c8@npm:^8.0.1":
-  version: 8.0.1
-  resolution: "c8@npm:8.0.1"
+"c8@npm:^9.0.0":
+  version: 9.0.0
+  resolution: "c8@npm:9.0.0"
   dependencies:
     "@bcoe/v8-coverage": "npm:^0.2.3"
     "@istanbuljs/schema": "npm:^0.1.3"
     find-up: "npm:^5.0.0"
-    foreground-child: "npm:^2.0.0"
+    foreground-child: "npm:^3.1.1"
     istanbul-lib-coverage: "npm:^3.2.0"
     istanbul-lib-report: "npm:^3.0.1"
     istanbul-reports: "npm:^3.1.6"
-    rimraf: "npm:^3.0.2"
     test-exclude: "npm:^6.0.0"
     v8-to-istanbul: "npm:^9.0.0"
     yargs: "npm:^17.7.2"
     yargs-parser: "npm:^21.1.1"
   bin:
     c8: bin/c8.js
-  checksum: 20338de2cff36beaf22d9114c9e8fca94d674dc643d81851300b46bc0cf9ed95c40bee755c8126f5b6b1a35672ffb69ae49285666bfb128ff418666395609904
+  checksum: d1be07d8a720807270adc7818492711aa7d3c201a6a3b6b69c85c8ebcf6eb5ccdcca81326b277dce6f19e00197b45a224c6915e707ee41ee0a2805dd538a855f
   languageName: node
   linkType: hard
 
@@ -4687,17 +4686,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"foreground-child@npm:^2.0.0":
-  version: 2.0.0
-  resolution: "foreground-child@npm:2.0.0"
-  dependencies:
-    cross-spawn: "npm:^7.0.0"
-    signal-exit: "npm:^3.0.2"
-  checksum: 6719982783a448162f9a01500757fb2053bc5dcd4d67c7cd30739b38ccc01b39f84e408c30989d1d8774519c021c0498e2450ab127690fb09d7f2568fd94ffcc
-  languageName: node
-  linkType: hard
-
-"foreground-child@npm:^3.1.0":
+"foreground-child@npm:^3.1.0, foreground-child@npm:^3.1.1":
   version: 3.1.1
   resolution: "foreground-child@npm:3.1.1"
   dependencies:
@@ -7156,7 +7145,7 @@ __metadata:
     "@typescript-eslint/parser": "npm:^6.13.2"
     ava: "npm:^6.0.0"
     bun-types: "npm:^1.0.15"
-    c8: "npm:^8.0.1"
+    c8: "npm:^9.0.0"
     cross-env: "npm:^7.0.3"
     electron: "npm:^28.0.0"
     esbuild: "npm:^0.19.8"