diff --git a/package-lock.json b/package-lock.json
index ffc4e95..fef1192 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -68,7 +68,7 @@
         "unist-util-visit": "^5.0.0",
         "vfile": "^6.0.3",
         "workerpool": "^10.0.1",
-        "ws": "^8.19.0",
+        "ws": "^8.21.0",
         "yargs": "^18.0.0"
       },
       "bin": {
@@ -7092,9 +7092,10 @@
       }
     },
     "node_modules/ws": {
-      "version": "8.19.0",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-8.19.0.tgz",
-      "integrity": "sha512-blAT2mjOEIi0ZzruJfIhb3nps74PRWTCz1IjglWEEpQl5XS/UNama6u2/rjFkDDouqr4L67ry+1aGIALViWjDg==",
+      "version": "8.21.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.21.0.tgz",
+      "integrity": "sha512-Vsp28b7DRcimFQvrqu2Wek3z1iYxDCWqHYB8Qsnk/S4RfaCQzPGPyBNuVjJV3cd6UiKtUtp6sNM77gWvzcCH+g==",
+      "license": "MIT",
       "engines": {
         "node": ">=10.0.0"
       },
diff --git a/package.json b/package.json
index cf9ac95..45508b0 100644
--- a/package.json
+++ b/package.json
@@ -94,7 +94,7 @@
     "unist-util-visit": "^5.0.0",
     "vfile": "^6.0.3",
     "workerpool": "^10.0.1",
-    "ws": "^8.19.0",
+    "ws": "^8.21.0",
     "yargs": "^18.0.0"
   },
   "devDependencies": {