diff --git a/package-lock.json b/package-lock.json
index 2870f963..87a7cd6e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -430,8 +430,7 @@
       "version": "file:script/readme-generator",
       "dev": true,
       "requires": {
-        "gray-matter": "^4.0.2",
-        "mustache": "^3.2.1"
+        "gray-matter": "^4.0.2"
       },
       "dependencies": {
         "gray-matter": {
@@ -564,9 +563,9 @@
       "integrity": "sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA=="
     },
     "@types/mustache": {
-      "version": "0.8.32",
-      "resolved": "https://registry.npmjs.org/@types/mustache/-/mustache-0.8.32.tgz",
-      "integrity": "sha512-RTVWV485OOf4+nO2+feurk0chzHkSjkjALiejpHltyuMf/13fGymbbNNFrSKdSSUg1TIwzszXdWsVirxgqYiFA==",
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/@types/mustache/-/mustache-3.2.0.tgz",
+      "integrity": "sha512-wpzYsmClHJ/QDHo2gIlzaN3lzIK2VI7/+mgT9R48iQwWTrb+mGEVX06FfDgBEcM1OpfpsS1gQ0bAUGECwDiStw==",
       "dev": true
     },
     "@types/node": {
@@ -4482,9 +4481,9 @@
       }
     },
     "mustache": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/mustache/-/mustache-3.2.1.tgz",
-      "integrity": "sha512-RERvMFdLpaFfSRIEe632yDm5nsd0SDKn8hGmcUwswnyiE5mtdZLDybtHAz6hjJhawokF0hXvGLtx9mrQfm6FkA==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/mustache/-/mustache-4.0.0.tgz",
+      "integrity": "sha512-FJgjyX/IVkbXBXYUwH+OYwQKqWpFPLaLVESd70yHjSDunwzV2hZOoTBvPf4KLoxesUzzyfTH6F784Uqd7Wm5yA==",
       "dev": true
     },
     "mute-stream": {
diff --git a/package.json b/package.json
index cdd242d1..09b47396 100644
--- a/package.json
+++ b/package.json
@@ -115,7 +115,7 @@
     "@types/deep-freeze-strict": "1.1.0",
     "@types/flat-cache": "2.0.0",
     "@types/lodash.clonedeep": "4.5.6",
-    "@types/mustache": "0.8.32",
+    "@types/mustache": "3.2.0",
     "@types/node": "12.x",
     "@types/parse-link-header": "1.0.0",
     "@typescript-eslint/eslint-plugin": "2.14.0",
@@ -140,7 +140,7 @@
     "lint-staged": "9.5.0",
     "lodash.clonedeep": "4.5.0",
     "metalsmith": "2.3.0",
-    "mustache": "3.2.1",
+    "mustache": "4.0.0",
     "nock": "11.7.1",
     "npm-run-all": "4.1.5",
     "package-version-git-tag": "2.0.2",