diff --git a/google-analytics-admin/package.json b/google-analytics-admin/package.json
index b70d0d3..3b4c474 100644
--- a/google-analytics-admin/package.json
+++ b/google-analytics-admin/package.json
@@ -27,7 +27,7 @@
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.3",
     "@eslint/js": "^10.0.0",
-    "c8": "^11.0.0",
+    "c8": "^12.0.0",
     "chai": "^4.2.0",
     "eslint": "^10.0.0",
     "eslint-config-google": "^0.14.0",
diff --git a/google-analytics-data/package.json b/google-analytics-data/package.json
index 2387890..95990ad 100644
--- a/google-analytics-data/package.json
+++ b/google-analytics-data/package.json
@@ -27,7 +27,7 @@
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.3",
     "@eslint/js": "^10.0.0",
-    "c8": "^11.0.0",
+    "c8": "^12.0.0",
     "chai": "^4.2.0",
     "eslint": "^10.0.0",
     "eslint-config-google": "^0.14.0",