diff --git a/packages/google-cloud-kms/package.json b/packages/google-cloud-kms/package.json
index 3de447cb481..2c4ecfecef6 100644
--- a/packages/google-cloud-kms/package.json
+++ b/packages/google-cloud-kms/package.json
@@ -56,7 +56,7 @@
     "jsdoc-baseline": "git+https://github.com/hegemonic/jsdoc-baseline.git",
     "intelli-espower-loader": "^1.0.1",
     "jsdoc": "^3.5.5",
-    "mocha": "^5.2.0",
+    "mocha": "^6.0.0",
     "nyc": "^13.0.0",
     "power-assert": "^1.6.0",
     "prettier": "^1.13.7",
diff --git a/packages/google-cloud-kms/samples/package.json b/packages/google-cloud-kms/samples/package.json
index 8ef9ec64906..73559036254 100644
--- a/packages/google-cloud-kms/samples/package.json
+++ b/packages/google-cloud-kms/samples/package.json
@@ -19,7 +19,7 @@
   "devDependencies": {
     "chai": "^4.2.0",
     "execa": "^1.0.0",
-    "mocha": "^5.2.0",
+    "mocha": "^6.0.0",
     "uuid": "^3.2.1",
     "yargs": "^13.0.0"
   }