diff --git a/package-lock.json b/package-lock.json
index 676d8fa..42a0605 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1561,9 +1561,15 @@
       }
     },
     "highlight.js": {
-      "version": "9.16.2",
-      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.16.2.tgz",
-      "integrity": "sha512-feMUrVLZvjy0oC7FVJQcSQRqbBq9kwqnYE4+Kj9ZjbHh3g+BisiPgF49NyQbVLNdrL/qqZr3Ca9yOKwgn2i/tw==",
+      "version": "10.4.1",
+      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-10.4.1.tgz",
+      "integrity": "sha512-yR5lWvNz7c85OhVAEAeFhVCc/GV4C30Fjzc/rCP0aCWzc1UUOPUk55dK/qdwTZHBvMZo+eZ2jpk62ndX/xMFlg==",
+      "dev": true
+    },
+    "highlightjs-graphql": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/highlightjs-graphql/-/highlightjs-graphql-1.0.2.tgz",
+      "integrity": "sha512-jShTftpKQDwMXc+7OHOpHXRYSweT08EO2YOIcLbwU00e9yuwJMYXGLF1eiDO0aUPeQU4/5EjAh5HtPt3ly7rvg==",
       "dev": true
     },
     "hmac-drbg": {
diff --git a/package.json b/package.json
index 75c3ec5..6db0d0d 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "@types/google-apps-script": "1.0.2",
     "browserify": "16.5.0",
     "clean-css-cli": "4.3.0",
-    "highlight.js": "9.16.2",
+    "highlight.js": "10.4.1",
     "highlightjs-graphql": "^1.0.2",
     "jquery": "3.4.1",
     "juice": "5.2.0",