diff --git a/package.json b/package.json
index abe4829..a5207be 100644
--- a/package.json
+++ b/package.json
@@ -62,8 +62,8 @@
     "@types/semver": "^7.5.4",
     "@voxpelli/eslint-config": "^19.0.0",
     "@voxpelli/tsconfig": "^9.0.0",
-    "c8": "^8.0.1",
-    "chai": "^4.3.10",
+    "c8": "^9.0.0",
+    "chai": "^5.0.0",
     "chai-as-promised": "^7.1.1",
     "desm": "^1.3.0",
     "eslint": "^8.51.0",