diff --git a/package-lock.json b/package-lock.json
index a8bc46b..3ee48b8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3894,9 +3894,9 @@
       "dev": true
     },
     "highlight.js": {
-      "version": "9.15.6",
-      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.15.6.tgz",
-      "integrity": "sha512-zozTAWM1D6sozHo8kqhfYgsac+B+q0PmsjXeyDrYIHHcBN0zTVT66+s2GW1GZv7DbyaROdLXKdabwS/WqPyIdQ==",
+      "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
     },
     "hmac-drbg": {
diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index ac3a6b2..71ed979
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "pako": "^1.0.10"
   },
   "devDependencies": {
-    "highlight.js": "^9.15.6",
+    "highlight.js": "^10.4.1",
     "html-webpack-plugin": "^3.2.0",
     "nearley": "^2.16.0",
     "node-blockly": "^1.0.36",