diff --git a/CHANGELOG.md b/CHANGELOG.md
index ab5a62d1..69f4e6a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,9 @@ _Note: Gaps between patch versions are faulty, broken or test releases._
 
 ## UNRELEASED
 
+* **Bug Fix**
+  * Restore `@babel/plugin-transform-class-properties` to fix HTML report ([#682](https://github.com/webpack-contrib/webpack-bundle-analyzer/pull/682) by [@valscion](https://github.com/valscion))
+
 ## 5.0.0
 
 * **Breaking Change**
diff --git a/package-lock.json b/package-lock.json
index abf9d2b7..50b275d1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -27,6 +27,7 @@
       "devDependencies": {
         "@babel/core": "7.26.9",
         "@babel/plugin-proposal-decorators": "7.25.9",
+        "@babel/plugin-transform-class-properties": "^7.27.1",
         "@babel/plugin-transform-runtime": "7.26.9",
         "@babel/preset-env": "7.26.9",
         "@babel/preset-react": "7.26.3",
@@ -169,13 +170,13 @@
       }
     },
     "node_modules/@babel/helper-annotate-as-pure": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.25.9.tgz",
-      "integrity": "sha512-gv7320KBUFJz1RnylIg5WWYPRXKZ884AGkYpgpWW02TH66Dl+HaC1t1CKd0z3R4b6hdYEcmrNZHUmfCP+1u3/g==",
+      "version": "7.27.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.27.3.tgz",
+      "integrity": "sha512-fXSwMQqitTGeHLBC08Eq5yXz2m37E4pJX1qAU1+2cNedz/ifv/bVXft90VeSav5nFO61EcNgwr0aJxbyPaWBPg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/types": "^7.25.9"
+        "@babel/types": "^7.27.3"
       },
       "engines": {
         "node": ">=6.9.0"
@@ -216,18 +217,18 @@
       "license": "ISC"
     },
     "node_modules/@babel/helper-create-class-features-plugin": {
-      "version": "7.26.9",
-      "resolved": "https://registry.npmjs.org/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.26.9.tgz",
-      "integrity": "sha512-ubbUqCofvxPRurw5L8WTsCLSkQiVpov4Qx0WMA+jUN+nXBK8ADPlJO1grkFw5CWKC5+sZSOfuGMdX1aI1iT9Sg==",
+      "version": "7.28.5",
+      "resolved": "https://registry.npmjs.org/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.28.5.tgz",
+      "integrity": "sha512-q3WC4JfdODypvxArsJQROfupPBq9+lMwjKq7C33GhbFYJsufD0yd/ziwD+hJucLeWsnFPWZjsU2DNFqBPE7jwQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/helper-annotate-as-pure": "^7.25.9",
-        "@babel/helper-member-expression-to-functions": "^7.25.9",
-        "@babel/helper-optimise-call-expression": "^7.25.9",
-        "@babel/helper-replace-supers": "^7.26.5",
-        "@babel/helper-skip-transparent-expression-wrappers": "^7.25.9",
-        "@babel/traverse": "^7.26.9",
+        "@babel/helper-annotate-as-pure": "^7.27.3",
+        "@babel/helper-member-expression-to-functions": "^7.28.5",
+        "@babel/helper-optimise-call-expression": "^7.27.1",
+        "@babel/helper-replace-supers": "^7.27.1",
+        "@babel/helper-skip-transparent-expression-wrappers": "^7.27.1",
+        "@babel/traverse": "^7.28.5",
         "semver": "^6.3.1"
       },
       "engines": {
@@ -283,14 +284,14 @@
       }
     },
     "node_modules/@babel/helper-member-expression-to-functions": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.25.9.tgz",
-      "integrity": "sha512-wbfdZ9w5vk0C0oyHqAJbc62+vet5prjj01jjJ8sKn3j9h3MQQlflEdXYvuqRWjHnM12coDEqiC1IRCi0U/EKwQ==",
+      "version": "7.28.5",
+      "resolved": "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.28.5.tgz",
+      "integrity": "sha512-cwM7SBRZcPCLgl8a7cY0soT1SptSzAlMH39vwiRpOQkJlh53r5hdHwLSCZpQdVLT39sZt+CRpNwYG4Y2v77atg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/traverse": "^7.25.9",
-        "@babel/types": "^7.25.9"
+        "@babel/traverse": "^7.28.5",
+        "@babel/types": "^7.28.5"
       },
       "engines": {
         "node": ">=6.9.0"
@@ -329,13 +330,13 @@
       }
     },
     "node_modules/@babel/helper-optimise-call-expression": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.25.9.tgz",
-      "integrity": "sha512-FIpuNaz5ow8VyrYcnXQTDRGvV6tTjkNtCK/RYNDXGSLlUD6cBuQTSw43CShGxjvfBTfcUA/r6UhUCbtYqkhcuQ==",
+      "version": "7.27.1",
+      "resolved": "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.27.1.tgz",
+      "integrity": "sha512-URMGH08NzYFhubNSGJrpUEphGKQwMQYBySzat5cAByY1/YgIRkULnIy3tAMeszlL/so2HbeilYloUmSpd7GdVw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/types": "^7.25.9"
+        "@babel/types": "^7.27.1"
       },
       "engines": {
         "node": ">=6.9.0"
@@ -370,15 +371,15 @@
       }
     },
     "node_modules/@babel/helper-replace-supers": {
-      "version": "7.26.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.26.5.tgz",
-      "integrity": "sha512-bJ6iIVdYX1YooY2X7w1q6VITt+LnUILtNk7zT78ykuwStx8BauCzxvFqFaHjOpW1bVnSUM1PN1f0p5P21wHxvg==",
+      "version": "7.27.1",
+      "resolved": "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.27.1.tgz",
+      "integrity": "sha512-7EHz6qDZc8RYS5ElPoShMheWvEgERonFCs7IAonWLLUTXW59DP14bCZt89/GKyreYn8g3S83m21FelHKbeDCKA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/helper-member-expression-to-functions": "^7.25.9",
-        "@babel/helper-optimise-call-expression": "^7.25.9",
-        "@babel/traverse": "^7.26.5"
+        "@babel/helper-member-expression-to-functions": "^7.27.1",
+        "@babel/helper-optimise-call-expression": "^7.27.1",
+        "@babel/traverse": "^7.27.1"
       },
       "engines": {
         "node": ">=6.9.0"
@@ -388,14 +389,14 @@
       }
     },
     "node_modules/@babel/helper-skip-transparent-expression-wrappers": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/helper-skip-transparent-expression-wrappers/-/helper-skip-transparent-expression-wrappers-7.25.9.tgz",
-      "integrity": "sha512-K4Du3BFa3gvyhzgPcntrkDgZzQaq6uozzcpGbOO1OEJaI+EJdqWIMTLgFgQf6lrfiDFo5FU+BxKepI9RmZqahA==",
+      "version": "7.27.1",
+      "resolved": "https://registry.npmjs.org/@babel/helper-skip-transparent-expression-wrappers/-/helper-skip-transparent-expression-wrappers-7.27.1.tgz",
+      "integrity": "sha512-Tub4ZKEXqbPjXgWLl2+3JpQAYBJ8+ikpQ2Ocj/q/r0LwE3UhENh7EUabyHjz2kCEsrRY83ew2DQdHluuiDQFzg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/traverse": "^7.25.9",
-        "@babel/types": "^7.25.9"
+        "@babel/traverse": "^7.27.1",
+        "@babel/types": "^7.27.1"
       },
       "engines": {
         "node": ">=6.9.0"
@@ -964,14 +965,14 @@
       }
     },
     "node_modules/@babel/plugin-transform-class-properties": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-class-properties/-/plugin-transform-class-properties-7.25.9.tgz",
-      "integrity": "sha512-bbMAII8GRSkcd0h0b4X+36GksxuheLFjP65ul9w6C3KgAamI3JqErNgSrosX6ZPj+Mpim5VvEbawXxJCyEUV3Q==",
+      "version": "7.27.1",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-class-properties/-/plugin-transform-class-properties-7.27.1.tgz",
+      "integrity": "sha512-D0VcalChDMtuRvJIu3U/fwWjf8ZMykz5iZsg77Nuj821vCKI3zCyRLwRdWbsuJ/uRwZhZ002QtCqIkwC/ZkvbA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/helper-create-class-features-plugin": "^7.25.9",
-        "@babel/helper-plugin-utils": "^7.25.9"
+        "@babel/helper-create-class-features-plugin": "^7.27.1",
+        "@babel/helper-plugin-utils": "^7.27.1"
       },
       "engines": {
         "node": ">=6.9.0"
diff --git a/package.json b/package.json
index f6ed68cc..b482add8 100644
--- a/package.json
+++ b/package.json
@@ -48,6 +48,7 @@
   "devDependencies": {
     "@babel/core": "7.26.9",
     "@babel/plugin-proposal-decorators": "7.25.9",
+    "@babel/plugin-transform-class-properties": "^7.27.1",
     "@babel/plugin-transform-runtime": "7.26.9",
     "@babel/preset-env": "7.26.9",
     "@babel/preset-react": "7.26.3",
diff --git a/webpack.config.js b/webpack.config.js
index 83b8e566..7ff7449d 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -77,6 +77,7 @@ module.exports = opts => {
             plugins: [
               'lodash',
               ['@babel/plugin-proposal-decorators', {legacy: true}],
+              ['@babel/plugin-transform-class-properties', {loose: true}],
               ['@babel/plugin-transform-runtime', {
                 useESModules: true
               }]