diff --git a/package.json b/package.json
index 6c7152cf..9ea316f3 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
     "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": "^1.13.6",
diff --git a/samples/package.json b/samples/package.json
index 22aa5ab1..4764cfe4 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -25,7 +25,7 @@
     "@google-cloud/storage": "^2.0.0",
     "chai": "^4.2.0",
     "execa": "^1.0.0",
-    "mocha": "^5.0.0",
+    "mocha": "^6.0.0",
     "uuid": "^3.2.1"
   }
 }