diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3745829c7..a780d92e4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,6 +40,8 @@
   ([#7963](https://github.com/mitmproxy/mitmproxy/pull/7963), @Julien00859)
 - Fix event loop leak when running tests
   ([#7982](https://github.com/mitmproxy/mitmproxy/pull/7982), @DNEGEL3125)
+- Fix TypeScript build by adding React types and removing obsolete `@ts-expect-error` directives.
+  ([#7988](https://github.com/mitmproxy/mitmproxy/pull/7988), @DNEGEL3125)
 
 ## 15 October 2025: mitmproxy 12.2.0
 
diff --git a/web/package-lock.json b/web/package-lock.json
index e9c10a827..c0c97ad42 100644
--- a/web/package-lock.json
+++ b/web/package-lock.json
@@ -13,6 +13,7 @@
                 "@floating-ui/react-dom": "^2.1.2",
                 "@popperjs/core": "^2.11.8",
                 "@reduxjs/toolkit": "^2.8.1",
+                "@types/react": "^19.2.6",
                 "@uiw/react-codemirror": "^4.23.12",
                 "bootstrap": "^3.4.1",
                 "classnames": "^2.3.1",
@@ -86,6 +87,7 @@
             "integrity": "sha512-e7jT4DxYvIDLk1ZHmU/m/mB19rex9sv0c2ftBtjSBv+kVM/902eh0fINUzD7UwLLNR+jU585GxUJ8/EBfAM5fw==",
             "dev": true,
             "license": "MIT",
+            "peer": true,
             "dependencies": {
                 "@babel/code-frame": "^7.27.1",
                 "@babel/generator": "^7.28.5",
@@ -709,6 +711,7 @@
             "resolved": "https://registry.npmjs.org/@codemirror/view/-/view-6.36.8.tgz",
             "integrity": "sha512-yoRo4f+FdnD01fFt4XpfpMCcCAo9QvZOtbrXExn4SqzH32YC6LgzqxfLZw/r6Ge65xyY03mK/UfUqrVw1gFiFg==",
             "license": "MIT",
+            "peer": true,
             "dependencies": {
                 "@codemirror/state": "^6.5.0",
                 "style-mod": "^4.1.0",
@@ -2413,6 +2416,7 @@
             "integrity": "sha512-pemlzrSESWbdAloYml3bAJMEfNh1Z7EduzqPKprCH5S341frlpYnUEW0H72dLxa6IsYr+mPno20GiSm+h9dEdQ==",
             "dev": true,
             "license": "MIT",
+            "peer": true,
             "dependencies": {
                 "@babel/code-frame": "^7.10.4",
                 "@babel/runtime": "^7.12.5",
@@ -2676,33 +2680,14 @@
                 "undici-types": "~7.16.0"
             }
         },
-        "node_modules/@types/prop-types": {
-            "version": "15.7.12",
-            "resolved": "https://registry.npmjs.org/@types/prop-types/-/prop-types-15.7.12.tgz",
-            "integrity": "sha512-5zvhXYtRNRluoE/jAp4GVsSduVUzNWKkOZrCDBWYtE7biZywwdC2AcEzg+cSMLFRfVgeAFqpfNabiPjxFddV1Q==",
-            "optional": true,
-            "peer": true
-        },
         "node_modules/@types/react": {
-            "version": "18.3.3",
-            "resolved": "https://registry.npmjs.org/@types/react/-/react-18.3.3.tgz",
-            "integrity": "sha512-hti/R0pS0q1/xx+TsI73XIqk26eBsISZ2R0wUijXIngRK9R/e7Xw/cXVxQK7R5JjW+SV4zGcn5hXjudkN/pLIw==",
-            "optional": true,
+            "version": "19.2.6",
+            "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.6.tgz",
+            "integrity": "sha512-p/jUvulfgU7oKtj6Xpk8cA2Y1xKTtICGpJYeJXz2YVO2UcvjQgeRMLDGfDeqeRW2Ta+0QNFwcc8X3GH8SxZz6w==",
+            "license": "MIT",
             "peer": true,
             "dependencies": {
-                "@types/prop-types": "*",
-                "csstype": "^3.0.2"
-            }
-        },
-        "node_modules/@types/react-dom": {
-            "version": "18.3.0",
-            "resolved": "https://registry.npmjs.org/@types/react-dom/-/react-dom-18.3.0.tgz",
-            "integrity": "sha512-EhwApuTmMBmXuFOikhQLIBUn6uFg81SwLMOAUgodJF14SOBOCMdU04gDoYi0WOJJHD144TL32z4yDqCW3dnkQg==",
-            "dev": true,
-            "optional": true,
-            "peer": true,
-            "dependencies": {
-                "@types/react": "*"
+                "csstype": "^3.2.2"
             }
         },
         "node_modules/@types/redux-mock-store": {
@@ -2804,6 +2789,7 @@
             "integrity": "sha512-LKMrmwCPoLhM45Z00O1ulb6jwyVr2kr3XJp+G+tSEZcbauNnScewcQwtJqXDhXeYPDEjZ8C1SjXm015CirEmGg==",
             "dev": true,
             "license": "MIT",
+            "peer": true,
             "dependencies": {
                 "@typescript-eslint/scope-manager": "8.32.1",
                 "@typescript-eslint/types": "8.32.1",
@@ -3087,6 +3073,7 @@
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             "dev": true,
             "license": "MIT",
+            "peer": true,
             "bin": {
                 "acorn": "bin/acorn"
             },
@@ -3654,6 +3641,7 @@
                 }
             ],
             "license": "MIT",
+            "peer": true,
             "dependencies": {
                 "baseline-browser-mapping": "^2.8.19",
                 "caniuse-lite": "^1.0.30001751",
@@ -4141,11 +4129,10 @@
             "dev": true
         },
         "node_modules/csstype": {
-            "version": "3.1.3",
-            "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.1.3.tgz",
-            "integrity": "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw==",
-            "optional": true,
-            "peer": true
+            "version": "3.2.3",
+            "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.2.3.tgz",
+            "integrity": "sha512-z1HGKcYy2xA8AGQfwrn0PAy+PB7X/GSj3UVJW9qKyn43xWa+gl5nXmU4qqLMRzWVLFC8KusUX8T/0kCiOYpAIQ==",
+            "license": "MIT"
         },
         "node_modules/data-urls": {
             "version": "3.0.2",
@@ -4644,6 +4631,7 @@
             "dev": true,
             "hasInstallScript": true,
             "license": "MIT",
+            "peer": true,
             "bin": {
                 "esbuild": "bin/esbuild"
             },
@@ -5133,6 +5121,7 @@
             "integrity": "sha512-BhHmn2yNOFA9H9JmmIVKJmd288g9hrVRDkdoIgRCRuSySRUHH7r/DI6aAXW9T1WwUuY3DFgrcaqB+deURBLR5g==",
             "dev": true,
             "license": "MIT",
+            "peer": true,
             "dependencies": {
                 "@eslint-community/eslint-utils": "^4.8.0",
                 "@eslint-community/regexpp": "^4.12.1",
@@ -6099,8 +6088,7 @@
             "resolved": "https://registry.npmjs.org/growly/-/growly-1.3.0.tgz",
             "integrity": "sha512-+xGQY0YyAWCnqy7Cd++hc2JqMYzlm0dG30Jd0beaA64sROr8C4nt8Yc9V5Ro3avlSUDTN0ulqP/VBKi1/lLygw==",
             "dev": true,
-            "optional": true,
-            "peer": true
+            "optional": true
         },
         "node_modules/has-bigints": {
             "version": "1.1.0",
@@ -6666,7 +6654,6 @@
             "integrity": "sha512-F+i2BKsFrH66iaUFc0woD8sLy8getkwTwtOBjvs56Cx4CgJDeKQeqfz8wAYiSb8JOprWhHH5p77PbmYCvvUuXQ==",
             "dev": true,
             "optional": true,
-            "peer": true,
             "bin": {
                 "is-docker": "cli.js"
             },
@@ -7007,7 +6994,6 @@
             "integrity": "sha512-fKzAra0rGJUUBwGBgNkHZuToZcn+TtXHpeCgmkMJMMYx1sQDYaCSyjJBSCa2nH1DGm7s3n1oBnohoVTBaN7Lww==",
             "dev": true,
             "optional": true,
-            "peer": true,
             "dependencies": {
                 "is-docker": "^2.0.0"
             },
@@ -9801,7 +9787,6 @@
             "dev": true,
             "license": "MIT",
             "optional": true,
-            "peer": true,
             "dependencies": {
                 "growly": "^1.3.0",
                 "is-wsl": "^2.2.0",
@@ -9817,7 +9802,6 @@
             "integrity": "sha512-FNAIBWCx9qcRhoHcgcJ0gvU7SN1lYU2ZXuSfl04bSC5OpvDHFyJCjdNHomPXxjQlCBU67YW64PzY7/VIEH7F2w==",
             "dev": true,
             "optional": true,
-            "peer": true,
             "bin": {
                 "semver": "bin/semver.js"
             },
@@ -10570,6 +10554,7 @@
             "resolved": "https://registry.npmjs.org/react/-/react-19.1.0.tgz",
             "integrity": "sha512-FS+XFBNvn3GTAWq26joslQgWNoFu08F4kl0J4CgdNKADkdSGXQyTCnKteIAJy96Br6YbpEU1LSzV5dYtjMkMDg==",
             "license": "MIT",
+            "peer": true,
             "engines": {
                 "node": ">=0.10.0"
             }
@@ -10579,6 +10564,7 @@
             "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-19.1.0.tgz",
             "integrity": "sha512-Xs1hdnE+DyKgeHJeJznQmYMIBG3TKIHJJT95Q58nHLSrElKlGQqDTR2HQ9fx5CN/Gk6Vh/kupBTDLU11/nDk/g==",
             "license": "MIT",
+            "peer": true,
             "dependencies": {
                 "scheduler": "^0.26.0"
             },
@@ -10597,6 +10583,7 @@
             "resolved": "https://registry.npmjs.org/react-redux/-/react-redux-9.2.0.tgz",
             "integrity": "sha512-ROY9fvHhwOD9ySfrF0wmvu//bKCQ6AeZZq1nJNtbDC+kk5DuSuNX/n6YWYF/SYy7bSba4D4FSz8DJeKY/S/r+g==",
             "license": "MIT",
+            "peer": true,
             "dependencies": {
                 "@types/use-sync-external-store": "^0.0.6",
                 "use-sync-external-store": "^1.4.0"
@@ -10655,7 +10642,8 @@
         "node_modules/redux": {
             "version": "5.0.1",
             "resolved": "https://registry.npmjs.org/redux/-/redux-5.0.1.tgz",
-            "integrity": "sha512-M9/ELqF6fy8FwmkpnF0S3YKOqMyoWJ4+CS5Efg2ct3oY9daQvd/Pc71FpGZsVsbl3Cpb+IIcjBDUnnyBdQbq4w=="
+            "integrity": "sha512-M9/ELqF6fy8FwmkpnF0S3YKOqMyoWJ4+CS5Efg2ct3oY9daQvd/Pc71FpGZsVsbl3Cpb+IIcjBDUnnyBdQbq4w==",
+            "peer": true
         },
         "node_modules/redux-mock-store": {
             "version": "1.5.5",
@@ -11496,8 +11484,7 @@
             "resolved": "https://registry.npmjs.org/shellwords/-/shellwords-0.1.1.tgz",
             "integrity": "sha512-vFwSUfQvqybiICwZY5+DAWIPLKsWO31Q91JSKl3UYv+K5c2QRPzn0qzec6QPu1Qc9eHYItiP3NdJqNVqetYAww==",
             "dev": true,
-            "optional": true,
-            "peer": true
+            "optional": true
         },
         "node_modules/side-channel": {
             "version": "1.1.0",
@@ -12176,6 +12163,7 @@
             "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
             "dev": true,
             "license": "MIT",
+            "peer": true,
             "engines": {
                 "node": ">=12"
             },
@@ -12416,6 +12404,7 @@
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             "dev": true,
             "license": "Apache-2.0",
+            "peer": true,
             "bin": {
                 "tsc": "bin/tsc",
                 "tsserver": "bin/tsserver"
@@ -12657,7 +12646,6 @@
             "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg==",
             "dev": true,
             "optional": true,
-            "peer": true,
             "bin": {
                 "uuid": "dist/bin/uuid"
             }
@@ -12682,6 +12670,7 @@
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             "dev": true,
             "license": "MIT",
+            "peer": true,
             "dependencies": {
                 "esbuild": "^0.25.0",
                 "fdir": "^6.5.0",
@@ -12775,6 +12764,7 @@
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             "dev": true,
             "license": "MIT",
+            "peer": true,
             "engines": {
                 "node": ">=12"
             },
diff --git a/web/package.json b/web/package.json
index 5c4e6531d..07a623aa5 100644
--- a/web/package.json
+++ b/web/package.json
@@ -16,6 +16,7 @@
         "@floating-ui/react-dom": "^2.1.2",
         "@popperjs/core": "^2.11.8",
         "@reduxjs/toolkit": "^2.8.1",
+        "@types/react": "^19.2.6",
         "@uiw/react-codemirror": "^4.23.12",
         "bootstrap": "^3.4.1",
         "classnames": "^2.3.1",
diff --git a/web/src/js/components/Modes/Popover.tsx b/web/src/js/components/Modes/Popover.tsx
index 4d829193e..6060841d9 100644
--- a/web/src/js/components/Modes/Popover.tsx
+++ b/web/src/js/components/Modes/Popover.tsx
@@ -45,11 +45,9 @@ export function Popover({
         <div
             className={classname ? `mode-popover ${classname}` : "mode-popover"}
         >
-            {/* @ts-expect-error no popover support yet */}
             <button popoverTarget={id} ref={buttonRef}>
                 <i className={iconClass} aria-hidden="true"></i>
             </button>
-            {/* @ts-expect-error no popover support yet */}
             <div id={id} popover="auto" ref={popoverRef}>
                 {children}
             </div>