diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e7b0dd6..e30017e9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,9 @@ _Note: Gaps between patch versions are faulty, broken or test releases._
 
 ## UNRELEASED
 
+* **Internal**
+  * Update `ws` dependency ([#691](https://github.com/webpack-contrib/webpack-bundle-analyzer/pull/691) by [@bjohansebas](https://github.com/bjohansebas))
+
 ## 5.1.1
 
 * **Bug Fix**
diff --git a/package-lock.json b/package-lock.json
index d381f2b5..2ef02aec 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "opener": "^1.5.2",
         "picocolors": "^1.0.0",
         "sirv": "^2.0.3",
-        "ws": "^7.3.1"
+        "ws": "^8.19.0"
       },
       "bin": {
         "webpack-bundle-analyzer": "lib/bin/analyzer.js"
@@ -14296,28 +14296,6 @@
         "node": ">=18"
       }
     },
-    "node_modules/puppeteer-core/node_modules/ws": {
-      "version": "8.18.3",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.3.tgz",
-      "integrity": "sha512-PEIGCY5tSlUt50cqyMXfCzX+oOPqN0vuGqWzbcJ2xvnkzkq46oOpz7dQaTDBdfICb4N14+GARUDw2XV2N4tvzg==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=10.0.0"
-      },
-      "peerDependencies": {
-        "bufferutil": "^4.0.1",
-        "utf-8-validate": ">=5.0.2"
-      },
-      "peerDependenciesMeta": {
-        "bufferutil": {
-          "optional": true
-        },
-        "utf-8-validate": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/puppeteer/node_modules/argparse": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
@@ -17957,28 +17935,6 @@
         "node": ">=8.10.0"
       }
     },
-    "node_modules/webpack-dev-server/node_modules/ws": {
-      "version": "8.18.0",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.0.tgz",
-      "integrity": "sha512-8VbfWfHLbbwu3+N6OKsOMpBdT4kXPDDB9cJk2bJ6mh9ucxdlnNvH1e+roYkKmN9Nxw2yjz7VzeO9oOz2zJ04Pw==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=10.0.0"
-      },
-      "peerDependencies": {
-        "bufferutil": "^4.0.1",
-        "utf-8-validate": ">=5.0.2"
-      },
-      "peerDependenciesMeta": {
-        "bufferutil": {
-          "optional": true
-        },
-        "utf-8-validate": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/webpack-merge": {
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/webpack-merge/-/webpack-merge-6.0.1.tgz",
@@ -18345,15 +18301,16 @@
       }
     },
     "node_modules/ws": {
-      "version": "7.4.6",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.6.tgz",
-      "integrity": "sha512-YmhHDO4MzaDLB+M9ym/mDA5z0naX8j7SIlT8f8z+I0VtzsRbekxEutHSme7NPS2qE8StCYQNUnfWdXta/Yu85A==",
+      "version": "8.19.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.19.0.tgz",
+      "integrity": "sha512-blAT2mjOEIi0ZzruJfIhb3nps74PRWTCz1IjglWEEpQl5XS/UNama6u2/rjFkDDouqr4L67ry+1aGIALViWjDg==",
+      "license": "MIT",
       "engines": {
-        "node": ">=8.3.0"
+        "node": ">=10.0.0"
       },
       "peerDependencies": {
         "bufferutil": "^4.0.1",
-        "utf-8-validate": "^5.0.2"
+        "utf-8-validate": ">=5.0.2"
       },
       "peerDependenciesMeta": {
         "bufferutil": {
diff --git a/package.json b/package.json
index d464d6f7..36e74ad4 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "opener": "^1.5.2",
     "picocolors": "^1.0.0",
     "sirv": "^2.0.3",
-    "ws": "^7.3.1"
+    "ws": "^8.19.0"
   },
   "devDependencies": {
     "@babel/core": "7.26.9",
diff --git a/test/viewer.js b/test/viewer.js
index 1494e4cb..8cf3be49 100644
--- a/test/viewer.js
+++ b/test/viewer.js
@@ -47,7 +47,13 @@ describe('WebSocket server', function () {
           ].join('\r\n'));
         });
 
+        socket.on('close', function () {
+          server.close(done);
+        });
+
+        let count = 0;
         socket.on('data', function (chunk) {
+          ++count;
           const expected = Buffer.from([
             'HTTP/1.1 101 Switching Protocols',
             'Upgrade: websocket',
@@ -57,14 +63,14 @@ describe('WebSocket server', function () {
             ''
           ].join('\r\n'));
 
-          expect(chunk.equals(expected)).to.be.true;
+          // Because data may be received in multiple chunks, only check the first one
+          if (count === 1) {
+            expect(chunk.equals(expected)).to.be.true;
+          }
 
           // Send a WebSocket frame with a reserved opcode (5) to trigger an error
           // to be emitted on the server.
           socket.write(Buffer.from([0x85, 0x00]));
-          socket.on('close', function () {
-            server.close(done);
-          });
         });
       })
       .catch(done);