diff --git a/harness/package-lock.json b/harness/package-lock.json
index 4352a5b7..11bf0127 100644
--- a/harness/package-lock.json
+++ b/harness/package-lock.json
@@ -24,7 +24,7 @@
         "@tailwindcss/vite": "^4.3.3",
         "@types/node": "^22.0.0",
         "@types/ws": "^8.18.1",
-        "electron": "^38.0.0",
+        "electron": "^39.8.10",
         "tailwindcss": "^4.3.3",
         "typescript": "^5.9.0",
         "vite": "^7.0.0",
@@ -2387,6 +2387,72 @@
         "node": ">=14.0.0"
       }
     },
+    "node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@emnapi/core": {
+      "version": "1.11.1",
+      "dev": true,
+      "inBundle": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "@emnapi/wasi-threads": "1.2.2",
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@emnapi/runtime": {
+      "version": "1.11.1",
+      "dev": true,
+      "inBundle": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@emnapi/wasi-threads": {
+      "version": "1.2.2",
+      "dev": true,
+      "inBundle": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@napi-rs/wasm-runtime": {
+      "version": "1.1.4",
+      "dev": true,
+      "inBundle": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "@tybys/wasm-util": "^0.10.1"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/Brooooooklyn"
+      },
+      "peerDependencies": {
+        "@emnapi/core": "^1.7.1",
+        "@emnapi/runtime": "^1.7.1"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@tybys/wasm-util": {
+      "version": "0.10.2",
+      "dev": true,
+      "inBundle": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/tslib": {
+      "version": "2.8.1",
+      "dev": true,
+      "inBundle": true,
+      "license": "0BSD",
+      "optional": true
+    },
     "node_modules/@tailwindcss/oxide-win32-arm64-msvc": {
       "version": "4.3.3",
       "resolved": "https://registry.npmjs.org/@tailwindcss/oxide-win32-arm64-msvc/-/oxide-win32-arm64-msvc-4.3.3.tgz",
@@ -3202,9 +3268,9 @@
       }
     },
     "node_modules/electron": {
-      "version": "38.8.6",
-      "resolved": "https://registry.npmjs.org/electron/-/electron-38.8.6.tgz",
-      "integrity": "sha512-lyBhcVi9QYAZL6FO6r5twAWAjWnYomo3iVDvrb5SJZlq928BGemHOKG0tPIq41NOLaCu9f3XdEEjMkjQPjprRg==",
+      "version": "39.8.10",
+      "resolved": "https://registry.npmjs.org/electron/-/electron-39.8.10.tgz",
+      "integrity": "sha512-zbYtGPYUI7PzqLAzkk21Rk6j67WN0hxn0Mq/njErZo1d0HSf33is4f8ICI5fMLy5vYe0JtCtM5sYunNOaochSQ==",
       "dev": true,
       "hasInstallScript": true,
       "license": "MIT",
diff --git a/harness/package.json b/harness/package.json
index f8313ef5..cf4250fc 100644
--- a/harness/package.json
+++ b/harness/package.json
@@ -29,7 +29,7 @@
     "@tailwindcss/vite": "^4.3.3",
     "@types/node": "^22.0.0",
     "@types/ws": "^8.18.1",
-    "electron": "^38.0.0",
+    "electron": "^39.8.10",
     "tailwindcss": "^4.3.3",
     "typescript": "^5.9.0",
     "vite": "^7.0.0",