diff --git a/deps/v8/tools/turbolizer/package-lock.json b/deps/v8/tools/turbolizer/package-lock.json
index bb53aa7860fb05..d2cd8078f6fedf 100644
--- a/deps/v8/tools/turbolizer/package-lock.json
+++ b/deps/v8/tools/turbolizer/package-lock.json
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+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
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@@ -3519,6 +4164,45 @@
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+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
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+          "dev": true,
+          "requires": {
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+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
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+        "strip-ansi": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
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@@ -3534,6 +4218,79 @@
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+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.3.2.tgz",
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+      "requires": {
+        "cliui": "^5.0.0",
+        "find-up": "^3.0.0",
+        "get-caller-file": "^2.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^3.0.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
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+      "dev": true,
+      "requires": {
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+        "lodash": "^4.17.15",
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diff --git a/deps/v8/tools/turbolizer/package.json b/deps/v8/tools/turbolizer/package.json
index dee28358d4b487..ab0afee3fb54f0 100644
--- a/deps/v8/tools/turbolizer/package.json
+++ b/deps/v8/tools/turbolizer/package.json
@@ -25,7 +25,7 @@
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     "chai": "^4.2.0",
     "local-web-server": "^2.6.0",
-    "mocha": "^5.2.0",
+    "mocha": "^6.2.3",
     "rollup": "^0.68.2",
     "ts-mocha": "^2.0.0",
     "tslint": "^5.12.0",