diff --git a/slides/reveal.js/package-lock.json b/slides/reveal.js/package-lock.json
index 209c4f2..76784f3 100644
--- a/slides/reveal.js/package-lock.json
+++ b/slides/reveal.js/package-lock.json
@@ -1,11 +1,11 @@
 {
   "name": "reveal.js",
-  "version": "4.1.0",
+  "version": "4.1.2",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
-      "version": "4.1.0",
+      "version": "4.1.2",
       "license": "MIT",
       "devDependencies": {
         "@babel/core": "^7.14.3",
@@ -9462,9 +9462,9 @@
       }
     },
     "node_modules/ws": {
-      "version": "6.2.1",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.1.tgz",
-      "integrity": "sha512-GIyAXC2cB7LjvpgMt9EKS2ldqr0MTrORaleiOno6TweZ6r3TKtoFQWay/2PceJ3RuBasOHzXNn5Lrw1X0bEjqA==",
+      "version": "6.2.2",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.2.tgz",
+      "integrity": "sha512-zmhltoSR8u1cnDsD43TX59mzoMZsLKqUweyYBAIvTngR3shc0W6aOZylZmq/7hqyVxPdi+5Ud2QInblgyE72fw==",
       "dev": true,
       "dependencies": {
         "async-limiter": "~1.0.0"
@@ -17161,9 +17161,9 @@
       }
     },
     "ws": {
-      "version": "6.2.1",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.1.tgz",
-      "integrity": "sha512-GIyAXC2cB7LjvpgMt9EKS2ldqr0MTrORaleiOno6TweZ6r3TKtoFQWay/2PceJ3RuBasOHzXNn5Lrw1X0bEjqA==",
+      "version": "6.2.2",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.2.tgz",
+      "integrity": "sha512-zmhltoSR8u1cnDsD43TX59mzoMZsLKqUweyYBAIvTngR3shc0W6aOZylZmq/7hqyVxPdi+5Ud2QInblgyE72fw==",
       "dev": true,
       "requires": {
         "async-limiter": "~1.0.0"