diff --git a/package-lock.json b/package-lock.json
index 007d55e21..1a1162441 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15714,9 +15714,9 @@
             "dev": true
         },
         "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"
@@ -15944,7 +15944,7 @@
                 "tree-kill": "^1.2.2",
                 "vscode-languageserver": "^9.0.1",
                 "vscode-languageserver-textdocument": "^1.0.12",
-                "ws": "^8.19.0"
+                "ws": "^8.21.0"
             },
             "devDependencies": {
                 "@types/node": "^18.19.62",
diff --git a/packages/safe-ds-lang/package.json b/packages/safe-ds-lang/package.json
index 82a7d7486..f1c52feb3 100644
--- a/packages/safe-ds-lang/package.json
+++ b/packages/safe-ds-lang/package.json
@@ -51,7 +51,7 @@
         "tree-kill": "^1.2.2",
         "vscode-languageserver": "^9.0.1",
         "vscode-languageserver-textdocument": "^1.0.12",
-        "ws": "^8.19.0"
+        "ws": "^8.21.0"
     },
     "devDependencies": {
         "@types/node": "^18.19.62",