diff --git a/web/build/builder-dmg-config.yaml b/web/build/builder-dmg-config.yaml
index 583e6657..066869a6 100644
--- a/web/build/builder-dmg-config.yaml
+++ b/web/build/builder-dmg-config.yaml
@@ -17,7 +17,6 @@ files:
       - node_modules/debounce-fn
       - node_modules/dot-prop
       - node_modules/electron-store
-      - node_modules/electron-serve
       - node_modules/env-paths
       - node_modules/fast-deep-equal
       - node_modules/fast-uri
diff --git a/web/build/builder-linux-config.yaml b/web/build/builder-linux-config.yaml
index 3f616c25..6525785c 100644
--- a/web/build/builder-linux-config.yaml
+++ b/web/build/builder-linux-config.yaml
@@ -18,7 +18,6 @@ files:
       - node_modules/debounce-fn
       - node_modules/dot-prop
       - node_modules/electron-store
-      - node_modules/electron-serve
       - node_modules/env-paths
       - node_modules/fast-deep-equal
       - node_modules/fast-uri
diff --git a/web/build/builder-mas-config.yaml b/web/build/builder-mas-config.yaml
index c86ebcbf..6ebba897 100644
--- a/web/build/builder-mas-config.yaml
+++ b/web/build/builder-mas-config.yaml
@@ -17,7 +17,6 @@ files:
       - node_modules/debounce-fn
       - node_modules/dot-prop
       - node_modules/electron-store
-      - node_modules/electron-serve
       - node_modules/env-paths
       - node_modules/fast-deep-equal
       - node_modules/fast-uri
diff --git a/web/build/builder-win-config.yaml b/web/build/builder-win-config.yaml
index 25a8de9c..66cf9566 100644
--- a/web/build/builder-win-config.yaml
+++ b/web/build/builder-win-config.yaml
@@ -18,7 +18,6 @@ files:
       - node_modules/debounce-fn
       - node_modules/dot-prop
       - node_modules/electron-store
-      - node_modules/electron-serve
       - node_modules/env-paths
       - node_modules/fast-deep-equal
       - node_modules/fast-uri
diff --git a/web/nextron.config.js b/web/nextron.config.js
index 06a9d15e..ff3fcbef 100644
--- a/web/nextron.config.js
+++ b/web/nextron.config.js
@@ -37,7 +37,12 @@ module.exports = {
     // require sub-paths (e.g. google-protobuf/google/protobuf/timestamp_pb.js).
     // Convert string externals to a function that matches by prefix.
     const prevExternals = config.externals || [];
-    const externalNames = prevExternals.filter(e => typeof e === "string");
+    // electron-serve v3+ is ESM-only, so it cannot stay external — the main
+    // process bundle is CommonJS and require() of it fails at runtime. Let
+    // webpack bundle it instead.
+    const externalNames = prevExternals.filter(
+      e => typeof e === "string" && e !== "electron-serve",
+    );
     const otherExternals = prevExternals.filter(e => typeof e !== "string");
     config.externals = [
       ...otherExternals,
diff --git a/web/package.json b/web/package.json
index 2c6ed0cd..a23024d0 100644
--- a/web/package.json
+++ b/web/package.json
@@ -51,7 +51,7 @@
     "chance": "^1.1.13",
     "classnames": "^2.3.2",
     "diff": "^5.2.2",
-    "electron-serve": "^1.3.0",
+    "electron-serve": "^3.0.1",
     "electron-store": "^8.2.0",
     "github-markdown-css": "^5.9.0",
     "google-protobuf": "^3.21.4",
diff --git a/web/yarn.lock b/web/yarn.lock
index 2322d2ce..b4ca298c 100644
--- a/web/yarn.lock
+++ b/web/yarn.lock
@@ -10163,7 +10163,7 @@ __metadata:
     electron: "npm:^39.8.5"
     electron-builder: "npm:^26.15.3"
     electron-builder-squirrel-windows: "npm:^26.15.3"
-    electron-serve: "npm:^1.3.0"
+    electron-serve: "npm:^3.0.1"
     electron-store: "npm:^8.2.0"
     eslint: "npm:^9.39.1"
     eslint-config-airbnb: "npm:^19.0.4"
@@ -10429,10 +10429,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"electron-serve@npm:^1.3.0":
-  version: 1.3.0
-  resolution: "electron-serve@npm:1.3.0"
-  checksum: 10c0/b329a24cb67147c11e9fd8828114d93f8378ba9337adc0cd6fb5d3b8d0aa00c22f906963a5db170e33402aac9156e47efd6acf162cefd48a94ee0b964482e94b
+"electron-serve@npm:^3.0.1":
+  version: 3.0.1
+  resolution: "electron-serve@npm:3.0.1"
+  checksum: 10c0/d2b87257da3c5e5cb6edf06771822183a391ddbe1305bb71b144adfe22564d9778c4df30997d10123e924886ea17f5bd1633010de64c8d2ece208647679f70f1
   languageName: node
   linkType: hard