diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a2c28147..e9b7fd4e 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -9,7 +9,7 @@ jobs:
           node-version: ${{matrix.node}}
       - run: npm install
       - run: npm test
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
     strategy:
       matrix:
         node:
diff --git a/package.json b/package.json
index 1f7de69b..c49f520f 100644
--- a/package.json
+++ b/package.json
@@ -114,7 +114,7 @@
     "@types/pluralize": "^0.0.33",
     "@types/ungap__structured-clone": "^1.0.0",
     "@ungap/structured-clone": "^1.0.0",
-    "c8": "^9.0.0",
+    "c8": "^10.0.0",
     "comment-parser": "^1.0.0",
     "control-pictures": "^2.0.0",
     "estree-util-is-identifier-name": "^3.0.0",